ACE+ Suite V2011.0
Contents
1. In simulations involving multiple species material balance can be performed either through mass fractions or mole fractions CFD ACE provides species mass fractions as an output when gas phase species are involved in the simulations When reactions are involved it may be useful to seek mole balance in addition to mass balance as an indicator of solution convergence Starting with this V2011 0 release species mole fractions can also be written to the DTF file by activating the option in the GUI under Out Graphics Gas Chemistry The solution can be viewed in CFD VIEW using variables of the form species name mol fraction 32 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 New Gas Phase reaction mechanism for Ar NF3 mixtures A gas phase reaction mechanism for low temperature plasmas sustained in Ar NF3 mixtures has been added to the Database CFD ACE GUI CFD ACE GUI V2011 0 includes all development that was required to enable or support the new features in CFD ACE Solver ACE Suite V2011 0 Release Notes 33 CFD ACE V2011 0 Corrected Problems The following is the list of issues addressed in this release gt Solver gt GUI o With 3D ICP and similar cases that use the Magnetic module certain Solver versions would stop with an error message to the effect that the coil current option was not available for 3D This arose due to a programming logic error that has now been fixed allowing such c2. New Features and Improvements CFD VIEW V2011 0 includes all new features and improvements developed in the last 12 months i e since the V2010 0 release in August 2010 The following sections summarize these developments Extended Cell Center Data Visualization In V2010 0 cell center data visualization capability was introduced in CFD VIEW The only entities that were not supported for cell center data were Calculator Simple Lines MinMax Probe and Carpet Plot In V2011 0 cell center data support has been extended to these entities as well 0 05171009898 0 05549822375 0 05990934744 elemental X _ elemental Y Expression Cell Radius sqrt Cell_X 2 Cell _Yx 2 Cell center data support for Calculator las Export 2X Remove oad l as Save E E Variable cei T x Value 414 362 Show Minimum Value Maximum Value in De ERES f A IN Inlet Zone 3 File Reader ZX OUT Outlet Zone 6 File Reader ss Point MinMaxProbe A FLOW 1 Surface Zone 3 File Reader SS FLOW 2 Surface Zones File Reader Cell center data support for MinMax Probe New Option to Snap Probes to Closest Grid Node The option to snap the Probe handle to the closest grid node has been made available for the following operators Point Probe Line Probe Trace and Strip Chart ACE Suite V2011 0 Release Notes 43 CFD VIEW V2011 0 Mode CF snap C DkMode xvz Mode Domain For IJK Mode
3. l i OEN fee penus c O a 7 nm Variable ko y vau o oc0121284 Without Snap With Snap Snap option for Point Probe New Logarithmic Colormap The option to logarithmically scale the Colormap has been introduced allowing the color spectrum to be denser near the lower variable values The intensity of the scaling can be adjusted via the Scale user input the lower the value the more intense the scaling Samples rs Iv Logarithmic Scale fi Maximize Sel Static Maximize All Dynamic Maximize Al Invert C Cumulative Normal linear Logarithmic Logarithmic Scale 10 Scale 1 Logarithmic Colormap 44 Release Notes ACE Suite V2011 0 CFD VIEW V2011 0 Improved Legend In V2011 0 the legend switches automatically to smooth display or flooded display based on the display type of the object it is tracking The already existing Flooded option in the Legend Properties window now becomes available only when the legend does not track the active map i e when it is not linked to any particular object This option allows the user to have flooded or smooth legend display independently of the object display type Legend display type matches Surface display type Improved Truetype Font Support for Headless CFD VIEW Annotation objects are now fully supported in headless mode This includes resolution of the font distortion issue that was observed with earlier versions ACE S
4. In general the Green Gauss and the Least Squares methods generate similar overall solution accuracy especially if a solution converges well The Least Squares approach usually yields slightly greater accuracy and slightly faster convergence and these advantages become more pronounced with increasing mesh skewness and increasing gradient magnitudes However the Least Squares approach also requires more memory and more computational effort so it is best to use this approach only when accuracy has a higher premium than turn around time or conservation of memory usage New VOF Boussinesq Approximation The Boussinesq Approximation modifies the incompressible Navier Stokes Equations by introducing a source term in the momentum equation that models the effects on the flow field of thermally induced buoyancy forces The advantage of this approximation is that the ability to model the buoyancy effects of a temperature dependent density is gained but without losing the incompressible form of the equations and all its attendant simplifications and computational benefits The disadvantage of this approximation is that its validity and accuracy are degraded with increasing buoyancy forces In earlier versions the Boussinesq Approximation was implemented only for incompressible homogeneous fluids In this V2011 0 release this implementation has been generalized and extended for invocation with the VOF Module enabling the simplified modeling of the effects o
5. Some or all of these problems may be corrected in a future release gt Solver o o gt GUI DSMC simulations may not work properly except for very simple cases Running the two fluid module with one of the fluids modeled as an ideal gas law may cause convergence problems The solver stops as soon as any macroparticle leaves the domain through an outlet There are intermittent memory leak problems when the chimera module is used with the flow and turbulence modules In some situations there may be a slight increase in the total pressure across an arbitrary interface Flow volume sources do not work with the two fluid module Robustness of parallel computation for Plasma simulations needs to be improved When solving for heat transfer the COND_IN and COND_OUT values reported in the Heat Transfer Summary for conjugate interfaces will not be accurate if the cells next to these conjugate interfaces are non orthogonal The Solver may fail to simulate certain electroplating cases that involve Cyclic BCs Importing a NASTRAN file may take longer on RedHat Enterprise 6 compared to other platforms In certain GUI tables like those used for Radiation properties if the default entries rows are deleted some inconsistencies may occur in the corresponding drop down lists later in the setup process Users are thus advised not to delete the default entries rows even if they are not going to be used in the setup Drag and drop d
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7. mesh on the right how the spur is captured Spurs can be used in 2 D models to represent thin walls baffles A surface with a spur Spurs may also be used in 3 D modeling to attach baffles to other surfaces In the following illustration notice how spurs are used to connect the baffle to the two lower surfaces During meshing this guarantees continuity between the surfaces 6 Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 Spurs connecting baffle to lower surfaces Surfaces without outer boundaries Closed surfaces such as spheres and toroids need not have outer boundaries and may contain only holes as in the following torus Surfaces without outer boundaries New Advanced Trimming Tool The Advanced Trimming Tool located in the Trimmed Surface Modification toolbox allows the user to create new surfaces or redefine the boundaries of an existing surface To create a new trimmed surface an untrimmed surface and a set of curves defining all the boundaries of the new surface should be selected To redefine the boundaries of an existing trimmed surface the surface should be selected the curves that currently bound the surface will be automatically selected Then curves can be deselected or additional curves selected to bound the surface This allows the user to simultaneously add remove holes spurs and interior free curves and to replace curves with Edge entities and vice versa Whether creating a new surfac
8. on the curved cylindrical bounds need to be specified The mesh on the curved cylindrical bounds can be specified to be projected Body fit or remain stair stepped Cylindrical bounding box with Body fit mesh on side option ON and OFF ACE Suite V2011 0 Release Notes 19 CFD VisCART V2011 0 Extended and Enhanced Refine Cells Near High Curvature Option If the Refine Cells Near High Curvature option is used during mesh generation the mesh gets refined near areas of the model that have high curvatures or sharp features This option that has been available in CFD VisCART for several versions has been enhanced extended in V2011 0 as mentioned below gt In earlier versions parameters Factor and Feature Angle were not accessible to users In V2011 0 these parameters can be user specified o Factor refers to the ratio of the specified surface cell size to the cell size after refinement In other words higher the value the more intense the refinement o Feature Angle refers to the dihedral angle between facets and refinement will take place only at locations where the dihedral angle is greater than the specified value Factor Feature Angle Effect of Factor and Feature Angle inputs The enhanced algorithm detects and refines high curvature areas not just within a patch but between patches as well Also edges connecting more than 2 facets are checked and refined if necessary gt Thi
9. processors due to the lack of SSE2 support on these CPUs CFD GEOM is not supported on Linux Suse 9 64 bit gt CFD TOPO Solver is not supported on Linux Suse 9 64 bit and Linux Suse 10 32 bit and 64 bit gt Browsers The webhelp system is known to work properly when viewed with Internet Explorer 6 MS Windows Netscape 6 MS Windows Linux or Firefox 3 MS Windows Linux It is not recommended to use Google Chrome for this purpose ACE Suite V2011 0 Release Notes ACE Suite V2011 0 gt The next major Release of the ACE Suite of Applications will not be supported on the platforms marked as deprecated On the other hand support on new platforms such as Suse 12 is expected in the next major Release Backward Compatibility There are no known backward compatibility problems with the ACE Suite of Applications except for the issue related to CFD GEOM V2006 or earlier scripts as mentioned below Due to numerous changes to the core of CFD GEOM in V2007 6 the Python wrapped functions also changed significantly This made it impossible to retain backwards compatibility for Python scripts This means that CFD GEOM V2007 6 or later versions cannot process CFD GEOM V2006 or earlier Python scripts It is indeed an unfortunate side effect and one that was not taken lightly but we felt that it was necessary in order to build a better CFD GEOM core So if you plan to use CFD GEOM V2006 script files you have a coup
10. shell is very close to other surfaces such that if boundary layer meshes are generated from these surfaces there would be layer intersection thus causing a Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 volume meshing failure The image on the right shows an example where boundary layers have been generated on the interior shell and some of the surfaces of the outer shell Boundary Layer generated on a model with multiple shells Limitation As mentioned above at this time boundary layers cannot be generated on thin walls New Discrete Surface Meshing Options Quad dominant and quad paved meshing along with the default triangle meshing is now available The default mesh type is unspecified and the mesh type setting in discrete surface meshing GUI will be used on the selected surfaces The mesh type can be directly set on the selected surfaces by selecting the desired mesh type setting and pressing the Apply button Shown below are examples of the mesh types as applied to a discrete surface Triangle quad paving and quad dominant meshes on a discrete surface New Cell Size per Surface for Discrete Surface Meshing Discrete surfaces may now be prescribed different cell sizes for surface meshing The minimum of the cell size values is used on common boundaries between surfaces The global value is used for those surfaces which have not been prescribed a cell size The image below shows an example where the ce
11. users to specify an area factor instead of a constant first layer thickness that allows the boundary layer thickness to vary locally according to the size of the surface mesh This area factor is a multiplicative factor and is expressed mathematically as Initial Thickness Area Factor x Representative length here Representative Length is a function of the local surface element cell size X Boundary Layer Generation Dialog r Boundary Layer Input Number of Layers 4 Area Factor 0 001 Growth Factor gt 1 0 1 25 Triangularize the boundary faces Generate Boundary Layer Cancel Local Thickness Boundary Layer Growing Method New Mesh Extrusion Feature Starting with V2011 0 a new option that allows outward extrusion of surface meshes is available to users After the volume mesh has been generated this option can be used to extrude the projected surface mesh outwards outside the volume domain in the direction normal to the surface mesh The user needs to specify the number of layers initial thickness and growth factor for this extrusion A typical application of this feature is windshield modeling Once the mesh inside the vehicle cabin has been generated this feature can be used to extrude the surface mesh on the windshield outwards thus generating the windshield thickness or volume Limitation Currently this feature is available only in batch mode Extrusion Layer generation 1
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13. 011 0 26 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 New Features and Improvements CFD ACE Solver CFD ACE Solver V2011 0 includes all new features and improvements developed in the last 12 months i e since the V2010 0 release in August 2010 The following sections summarize these developments Enhanced CAFVM Discrete Ordinate Method for Radiation The CAFVM implementation in CFD ACE Solver V2011 0 has been enhanced in the following ways gt Accurate computation of radiative intensities and fluxes at boundary surfaces oriented arbitrarily with reference to the Cartesian coordinate planes The enhancement based on a subdivision approach as shown below has the following impacts o Increased computational accuracy at arbitrarily oriented opaque surfaces o Correct purely specular treatment of arbitrarily oriented symmetry surfaces In earlier versions of CFD ACE symmetry surfaces not aligned with the Cartesian coordinate planes were treated as partly diffuse Unit sphere subdivision at a Boundary Face gt The degree of specularity of reflection at a boundary surface can now be explicitly specified The value range is 0 1 with the extreme bounds representing purely diffuse and purely specular reflectivity gt Accurate and robust subdivision treatment of Fresnel interfaces interfaces separating media of different refractive indices and involving both reflection and transmission of radiation The sp
14. 8 Release Notes ACE Suite V2011 0 CFD VisCART V2011 0 New Cancel button to Terminate Meshing Operation In CFD VisCART V2011 0 the Cancel mesh generation feature has been introduced This feature or capability allows users to cancel a meshing operation without losing killing the session or terminating the GUI When a meshing operation base mesh generation mesh improvement boundary layer generation or grid adaptation is kicked off a dialog pops up displaying the Status bar the Progress bar and a Cancel button Single Domain Projected Mesh is being generated Pleas Status Smoothing Front Faces Progress Dialog with Status bar Progress bar and Cancel button The Status and Progress bars keep dynamically updating providing information to the user as to which sub operation is taking place and how it is progressing If the Cancel button is pressed the system will prompt the user for a confirmation and then terminate the meshing operation Users have the option under Edit Preferences Advanced to specify what should happen when a meshing operation is canceled gt Go back to no mesh state OR gt Go back to the mesh that existed prior to the canceled meshing operation New Cylindrical Bounding Box In earlier versions the bounding box could only be Box shaped In this version a new Cylinder shaped bounding box option has been introduced With this option additional inputs for axis direction and mesh handling
15. ACE Suite includes a broad range of applications that provide the necessary tools for advanced multiphysics analysis in a virtual prototype environment The complete list of applications is shown below CFD GEOM CFD VIEW CFD VisCART CFD CADalyzer CFD ACE CFD TOPO CFD FASTRAN SimManager Supported Platforms The V2011 0 ACE Suite of applications is supported on the following platforms Platform Package Canonical Name Windows XP 2003 Vista 2008 Win7 on Intel or AMD 32 bit pc windows nt5 x86 Windows XP 2003 Vista 2008 Win7 on Intel or AMD 64 bit pc windows nt5 x86 64 Linux RedHat Enterprise 6 on Intel or AMD 32 bit Linux RedHat Enterprise 6 on Intel or AMD 64 bit pc linux rhe6 x86 pc linux rhe6 x86 64 pc linux rhe5 x86 Linux RedHat Enterprise 5 on Intel or AMD 64 bit pc linux rhe5 x86 64 Linux RedHat Enterprise 5 on Intel or AMD 32 bit Linux RedHat Enterprise 4 on Intel or AMD 32 bit deprecated pc linux rhe4 x86 Linux RedHat Enterprise 4 on Intel or AMD 64 bit deprecated pc linux rhe4 x86_64 Linux Suse 10 on Intel or AMD 32 bit deprecated pc linux suse10 x86 Linux Suse 10 on Intel or AMD 64 bit deprecated Linux Suse 9 on SGI Altix 64 bit deprecated pc linux suse10 x86 64 Sgi linux suse9 ia64 Notes gt V2011 0 applications are not supported on AMD Athlon processors or on Intel Pentium Ill
16. Features and IMproveMents ccceeeeeeeecceaeeeeeeeeeeeeeeeeaaaeeaeeeeeeeeeeeaaaaeeeeeeeeeaaes 27 Corrected Problems son docere gere tat ENO Cedo RE STR au 34 Iro Problems 35 CFD FASTRAN V20171 D iiaecenc exin aniio etd nacio Blant Rand ed a ev nc iiv end e Eae 37 New Features and IMproveMents ccceecceeeeeceeeeeeeeeeeeeeeeeeaaaaaaeeeeeeeeeesaaaaaeeeeeeeeaaas 39 Corrected Problems 2 oninia eta sine uoce eus iue aa ets aves e ero Rte n cda AL ETER Ea ia 40 Known Problems 5 sensn esM ade iota NAE IR aa haet aahessaa tetcaueadageniaaditceds 40 CFD VIEW V2011 0 iicet xa ex ore buck DER eR AX sussstunauswatuebutescndionuntccberenntdamvastactnwes 41 New Features and IMproveMents ccceeceeeeeeeeeaeeeeeeeeeeeeeeeaaaeaaeeeeeeeeeeeaaaeeeeeeeeeeaaaa 43 Gorrect d Problems oro ee a E Godin Ee ceret roux i Garr onal soos xe ue reece 46 Known Problems retineri a eer are P pU rag Part EE E nee teed 46 ACE Suite V2011 0 Release Notes V Table of Contents vi Release Notes ACE Suite V2011 0 ACE Suite V2011 0 This document introduces the V2011 0 Release of the ACE Suite of applications It summarizes the new features and improvements developed in the last 12 months i e since the V2010 0 Release in August 2010 It also includes the list of issues that have been corrected in this Release ACE Suite of Applications The
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18. a Y WC wp multiphysics C I get it right ACE Suite V2011 0 Release Notes www esi group com ACE Suite V2011 0 Release Notes 1997 2011 by ESI Group his ESI Group documentation is the confidential and proprietary product of ESI Group Inc Any unauthorized use reproduction or transfer of this manual is strictly prohibited This documentation is subject to limited distribution and restricted disclosure CFD ACE CFD ACE CFD CADalyzer CFD VIEW CFD GEOM SimManager CFD VisCART CFD Micromesh and CFD FASTRAN are registered trademarks of ESI Group Portions of this product are owned by third party software vendors Revision Information The information in this guide applies to all current ESI CFD products until superseded by a newer version of this guide Published November 2011 Disclaimers The documents and related know how herein provided by ESI Group subject to contractual conditions are to remain confidential The CLIENT shall not disclose the documentation and or related know how in whole or in part to any third party without the prior written permission of ESI Group About ESI GROUP ESI provides a world leading software editor for the numerical simulation of prototype and manufacturing process engineering in applied mechanics The key to ESI s success is the use of realistic material physics providing as good as real virtual solutions in order to replace the lengt
19. ach bounds 3 curves the closed curves on the top and bottom use them twice When a point entity on a surface is used other than twice by the bounding curves on the surface we refer to this as a non manifold surface When meshing this type of non manifold surface the mesh on the seam curve must be embedded in the surface mesh Note that in earlier versions of CFD GEOM such surfaces could not be modeled as a single surface but rather had to be split into 2 or more surfaces A periodic surface with a seam curve Periodic surfaces with separation loops In earlier versions of CFD GEOM a surface could be bounded exclusively by exactly 1 outer loop of curves and 0 or more inner loops of curves i e holes Separation loops do not fall into either category They define the outer boundaries of the surface but neither lies inside the other Moreover any holes that might be cut in the surface would not lie inside them either The following figure shows an example of such a surface with separation loops ACE Suite V2011 0 Release Notes 5 CFD GEOM V2011 0 A periodic surface with separation loops Non manifold surfaces in which internal holes touch the outer boundary Note that the hole must share a common point entity with the outer boundary as in the following figure Non manifold surfaces in which internal holes touch the outer boundary A surface with a spur the stray curve hanging in the surface interior Note in the
20. ases to run through An issue resulting in abnormal termination of the Solver when Cyclic Periodic boundary condition was used with the Electric module has been resolved An issue wherein the Boundary Integral Output feature would not work correctly when the Assembly option was used has been resolved In certain cases on linux platforms launching a Solver run from the GUI would fail with the error message OSError Errno 7 Argument list too long This issue has been resolved In certain cases on linux platforms parallel domain decomposition would fail due to a python issue related to nested interpreters Changes have been implemented to avoid this python issue Certain issues in the dtf decompose utility that were leading to domain decomposition failures have been resolved Intersection of surfaces treatment in the thin wall preprocess utility has been modified to resolve issues related to thin walls with T junctions Certain issues in the thin wall preprocess utility that were leading to thin wall node perturbation failures have been resolved Issue related to restarting electroplating simulations has been resolved In some instances user specified executables under Edit gt Preferences gt Tools gt Solver were being ignored for parallel runs This issue has been resolved 34 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 Known Problems The following are the known serious problems with this release
21. ated types of queries mostly involving loops have been removed In addition several useful queries taking advantage of the new surface topology system have been added Modifications to Graphical User Interface GUI Layout of Meshing Tools The shell creation domain creation and the thin wall creation removal tools have been moved from the Shell and Unstructured Domain Options in the Mesh tab to the Solid and Wireframe Option in the Geometry tab The semi structured domain creation tool has also been moved from the Shell and Unstructured Domain Options to the Structured and Semi Structured Domain Options Additionally the Shell and Unstructured Domain Options toolbox has been removed in its entirety In addition the journaling scripting functions CreateAllDomains CreateAllDomains2 CreateShell CreateDomain AddBafflesToDomain and RemoveBafflesFromDomain have been replicated from the GMesh to the GGeometry module and all future scripts should use GGeometry as the python module specifier for these functions Improved Surface Mesh Quality Tool The surface mesh quality tool has been improved to automatically select those surfaces which violate the given mesh quality criteria The user can then simply type Ctrl r in the graphics window to view only those surfaces The cell centroid check does not select the surfaces as it combines all given surface meshes into a single mesh prior to the check and it cannot determine which surfaces violate t
22. cation The IGES reader has gone through a revision that makes file import yield the proper results in most cases especially when importing files containing the subfigure entities and their transformations Additionally the reading process should be 2 3 times faster and this will be especially noticeable during the reading of large files Improved Geometry Revolution Tools Most geometry tools for creating revolved surfaces now support full 360 deg revolutions Note however that the volume grid revolution tool still does not support this at this time Improved STL Import Read The STL file importer reader now allows the selection of multiple files and the reader is now faster and able to handle multiple geometries in a single file Note that the names of files may no longer be input but must be selected due to an issue in the FOX library Improved Entities Projection Tool The entities projection tool has been improved to allow the projection of points lines and curves onto discrete surfaces Previously only CAD surfaces were supported Improved Advancing Front Triangle Meshing The advancing front triangle mesher has been improved to yield higher quality meshes especially near boundaries and in many cases where previously the mesher could give small angles or inverted cells The mesher is now also able to handle internal curves and is 3 5 times faster Improved Topology Queries Tool In the Topology Queries tool several antiqu
23. cations in Maintenance Mode CFD TOPO V2011 0 is a Maintenance Release of the application SimManager V2011 0 is a Maintenance Release of the application CFD CADalyzer V2011 0 is not being offered Users can continue running earlier versions of this application using the runver option as explained in the previous section 2 Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 Release Notes ACE Suite V2011 0 Release Notes CFD GEOM V2011 0 4 Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 New Features and Improvements CFD GEOM V2011 0 includes all new features and improvements developed in the last 12 months i e since the V2010 0 release in August 2010 The following sections summarize these developments Newly Supported Surface Topologies The surface modeling module has been expanded to support almost any standard surface topology output by major CAD systems including non manifold topologies This new capability significantly increases the success rate during import of SAT Parasolid STEP IGES and other CAD formats i e the need to repair topologies not understood by earlier versions of CFD GEOM should be virtually eliminated It also allows for easier modeling of special constructs such as baffles Newly supported topologies include but are not limited to the following A periodic surface with a seam curve Notice the end points of the seam curve in the image below the one running vertically E
24. com Software Sales cfdinfo esi group com Release Notes ACE Suite V2011 0 Table of Contents ACE Suite V2011 U ss ciesctcicescevtnae tava ar ait hala a RR anda du Far uw dua dalu wentusdandetduevanuelvavdusetuvventveuee 1 ACE Suite of Applications sie Avis ain Oe ee ave er eee o code BA o eos d 1 Supported Platforms used dodo aA davit to po edad va sine e du Fed a EROR 1 Backward Compatibilty s ioc cent ottenuto tu none sort ettet ces Eder dte de de ocu gebe Si eisai deki ikede rts 2 R nning Older VERSIONS ci usse aet areae esee Viet DOS e asit de bande coetus eade Lee hen 2 Applications in Maintenance Mode ssssssssssseesseeneeee me ener nennen 2 CFD GEOM V2011 0 iiie cepa de xa ke up d Na a RR NO Mi LEV aaan cs Lt mub cp a aude c cul rb Egi Ede 3 New Features and Improvements cccceeeeccceeeeeeeeeeeeeeeesaaeaaeeeeeeseeeeaaaaaaeeeeeeeaaaaeees 5 Corrected Problems ccccccceeeeccceeaeeeseeeeeeeeeceeaaeaaaaeeeeeeeeseaaeaaaeeeeseaaaaeeeeeeeseeesaaeneaes 13 Known uite uM 13 CFD Vis CART V2011 0 R ENE nanana 15 New Features and IMproveMents ccceecceeeeeeeeeeeeeeeeeeeeeeeeeaaaeaaeeeeeeeeeesaaaaaeeeeeeesaaes 17 Corrected Probletmis 5 5 tinea Coke aede etude esaiengeadatud ea a ad Te ga n RE de QURE Pa ERR de 24 Known Probleris 4 iere oreste ore pote e eoe dep acd e tei rede Ue ace RETE e eos 24 CFD ACEF V2011 0 E REA 25 New
25. ction Options Sweeps 50 m Criterion 0 1 m Solver options for the Flow module Improved Domain Decomposition Efficiency The domain decomposition utility has undergone a number of internal modifications that have significantly improved processing times for all types of meshes In particular a number of memory management changes have been made Also some processing sequences were re ordered for better efficiencies These and other improvements yield turn around times as little as half that of previous versions for certain simulations such as large polyhedral meshes produced by CFD VisCART ACE Suite V2011 0 Release Notes 29 CFD ACE V2011 0 Generalized Gradient and Divergence Calculation Options The gradients of scalar variables and the divergences of vector variables in a computational solution methodology are repeatedly calculated and used throughout the solution cycle These gradients and divergences are calculated for example to form discrete estimates of gradient and divergence terms that appear in the relevant governing equations to calculate interpolated and extrapolated values of variables and to compute derived quantities from fundamental physical laws and constitutive relations In earlier versions most gradients and divergences were calculated using the Green Gauss method With this V2011 0 release a Least Squares method is being introduced in a generalized form and the user can now select the default metho
26. d for calculating gradients and divergences from among these two methods so that most of the gradient and divergence calculations in the CFD ACE Solver will be performed using the selected method The reason why not all gradient and divergence calculations will be performed using the method selected by the user is that the gradient calculations for some variables in the Solver such as a few in the electro magnetics module are purposely hard wired for accuracy and consistence reasons to always use a Least Squares approach regardless of the option chosen in this section while some gradients in the flow and heat transfer modules are purposely hard wired for stability and consistence with other solvers to always use a Green Gauss approach The Green Gauss and the Least Squares approaches are the only approaches that enable the gradients and divergences to be calculated in a uniform manner for all types of cells including the arbitrary polyhedral type To select the default gradient and divergence calculation method the user can toggle between the two available alternatives in the appropriately labelled pull down menu in the Adv Advanced sub tab under the SC Solution Control main tab in the CFD ACE GUI The default option selection remains the Green Gauss method which was the default method in earlier releases of the CFD ACE Solver Neither of these two gradient calculation methods currently requires any additional parameters or user inputs
27. dary layer height should be a function of the local surface element size SI NN V i2 an s e avi e S SZ LS SAZ ee XA SEA KY KO aV QZ Z KR PAN S SEN as va Ni K s ALS ZI ZX KA d V AW A iN Yi RS a G x S RON e ATS V A RJ DA N AN NINDS s VOX AVV NA ND y 4 KE INI ND LOX Y KN PX INN LKR VA VA KN Y EV EVA VAY SB AVA X A YV S POL ZSA S S p IN V LSE PIK VV MA FKA AT V 3 ZA TS COD Z A TAVAYA ANa WANDS xI LN V SE PAIS NISI CORT NIS CK SD V gt RDO Y A KIS So OZ V KD Z vid AZ AVORT i Deed A AINATO Boundary Layer generated using the two options Improved Boundary Layer Robustness The boundary layer meshing has been improved for robustness and can now handle thin walls i e baffle surfaces At this time however boundary layers may not be generated from thin walls The image below shows an example with thin wall surfaces notice how the layers are terminated to avoid intersecting the thin walls Boundary layer generated on a model Additionally the meshing has been improved to account for ad with thin walls ditional shells that may be present in the domain The image to the left shows one domain with two shells the green surfaces represent an internal void or shell Notice that the internal
28. do Operations in the Edge Editor Undo is unavailable in the Edge editor If the user quits the edge editing session at any point where the system is in an error state faces with opposing edges without the same number or grid points CFD GEOM will reinstate the grid system to the last known good state Difference in ACIS All platform except pc linux rhe4 x86 and pc linux rhe4 x86_64 have been upgraded to ACIS version 22 0 0 These two platforms remain at ACIS version 18 and therefore there may be some differences in performance Limited CAD Import Options on 64 bit Linux Platforms Several CAD import options Parasolid UG Pro E Catia V4 and Step are available on 32 bit Linux platforms but not on 64 bit Linux platforms due to the limitation in ACIS version 22 0 0 This limitation is expected to be removed in a future release ACE Suite V2011 0 Release Notes 13 CFD GEOM V2011 0 14 Release Notes ACE Suite V2011 0 CFD VisCART V2011 0 Release Notes ACE Suite V2011 0 Release Notes CFD VisCART V2011 0 16 Release Notes ACE Suite V2011 0 CFD VisCART V2011 0 New Features and Improvements CFD VisCART V2011 0 includes all new features and improvements developed in the last 12 months i e since the V2010 0 release in August 2010 The following sections summarize these developments Support for Parallel Boundary Layer Generation for Single Domain Mesher In earlier versions boundary layer gene
29. e following example discharge generated in Argon shows the improvement in results with wave effects Ne avg 1 m 3 3025E416 3E 16 Poisson pi 1E 16 SE 15 o 6171E 16 6E416 Wave Effects 36416 26416 16416 o Wave Effects in a discharge generated in Argon Improved Linear Solver and Preconditioner Choices CFD ACE provides a set of linear solvers and preconditioners to find the solution for the set of linear equations generated at each cell of the discretized model The choice of linear solver and matrix preconditioner can have a major impact on the computation time and solution quality Starting with V2011 0 CFD ACE will provide the following choices of linear solvers and matrix preconditioners Solvers gt Conjugate Gradient Squared CGS Solver gt Generalized Minimum Residual GMRES Solver gt Algebraic Multigrid AMG Solver Preconditioners Incomplete LU Factorization ILU k Preconditioner gt Symmetric Successive Over Relaxation SSOR Preconditioner gt Smoothed Aggregation Algebraic Multigrid SA AMG Preconditioner Users can choose any combination of solver and preconditioner for each variable being solved In general finding the best choice for solver and preconditioner is a complex task and is dependent on the application problem modeled The default choices provided by CFD ACE reflect a balance 28 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 between solv
30. e or redefining an existing surface the order in which curves are selected is not important As long as they lie on the surface and collectively form a valid topology CFD GEOM will determine their relationships Modifications to surfaces that belong to shells or semi structured domains are disallowed if they would break those entities e g cause a shell to open In the scripting interface this capability is available through Ggeometry TrimSurfaceAdvanced New Boundary Layer Meshing Option The boundary layer meshing algorithm has been modified for a new option which controls the initial thickness in earlier versions the only option was to specify the exact desired thickness of the first layer The new option allows the specification of a factor applied to the local cell size to control thickness The first image below shows the boundary layer growth with an exact specified thickness while the subsequent image shows the optional behavior where the growth is based on a local surface element size notice the element size is dependent on the local surface cell size The associated script function has been modified to Gmesh GloballyEnableBoundaryLayerMeshing num_layers initial_thickness growth_rate local_gro wth local_growth_factor ACE Suite V2011 0 Release Notes 7 CFD GEOM V2011 0 The last two arguments are defaulted to 0 and 1 respective ly and any previous scripts will continue to work Set local_growth to 1 if the boun
31. ectral reflectivity and transmissivity are computed internally based on an ideal electromagnetic analysis of dielectric interfaces n Medium 1 Medium 2 Optics at a Fresnel Interface ACE Suite V2011 0 Release Notes 27 CFD ACE V2011 0 gt Refractive index of a medium can now be explicitly specified as a volumetric property In earlier versions the refractive index was tacitly assumed to be unity in the computation of blackbody emission Improved Plasma implementation with Wave Effects An enhanced implementation is available with this release of the CFD ACE Solver to enable the modeling of electromagnetic wave effects in large area high frequency capacitively coupled plasma reactors This implementation allows for the solution of the magnetic vector potential in time domain allowing mutual intra RF cycle feedback with the computation of plasma conductivity Electric field equations that drive charged species transport are computed from the contributions of the gradient of the scalar potential and the time derivative of the vector magnetic potential The total power absorbed by electrons includes the so called electrostatic and electromagnetic inductive power contributions For the most part the model setup follows the traditional CCP model available so for The additional inputs include checking the Magnet Module and setting the relevant magnetic options for enabling the computations to include wave effects Th
32. er robustness complexity and scalability The default settings provided for each variable solver preconditioner should be sufficient for most cases For users interested in exploring these options an ordering of the available linear solvers and preconditioners in increasing cost per iteration is provided in the table below Solver Preconditioner Generalized Minimum Residual GMRES 1 Symmetric Successive Over Relaxation Conjugate Gradient Squared CGS Incomplete LU Factorization ILU k 2 Aggregation Algebraic Multigrid AMG Smoothed Aggregation Algebraic Multigrid SA AMG 3 Low cost depends on a low value of the restart parameter Cost is equivalent to a direct solution cycle with unlimited restart Cost increases with the value of k The default value of k is 0 Cost includes the setup cost which can be amortized if the related hierarchy is constructed only periodically The additional solvers provided with this release come from the Portable Extensible Toolkit for Scientific Computation PETSc If any of the PETSc solvers are called the CFD ACE SOLVER PLATFORM MPI executable will be launched and all cases single or multi processor will be run as if in parallel mode Solvers Flow Linear Solver Pre Conditioner Velocity CGS ILU Pressure Correction AMG None Velocity Options Sweeps so Criterion 0 0001 bd Levels of Fill o Expectedril Lo gt Zeros on Diagonal No Pressure Corre
33. f thermally induced buoyancy forces in flow fields containing two immiscible fluids with arbitrarily different properties An example of such flow fields is shown in Figures 1 a and 1 b below wherein an enclosure with a hot right wall and a cold left wall contain two fluids in a vertical gravity field and wherein the buoyancy currents in the two fluids are clearly identifiable 30 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 a The velocity field and VOF function b The temperature field The velocity VOF and temperature fields computed with the Boussinesq Approximation for two immiscible fluids under the action of gravity and the resulting thermally induced buoyancy forces The Boussinesq Approximation is activated set up and used for two phase simulations in the same way that it was used for single phase simulations the only difference is that if a second phase is present then the volumetric coefficient of thermal expansion and the reference temperature for that second phase must also be provided in addition to the corresponding values for the first phase All other model inputs and parameters remain the same as in earlier versions of the CFD ACE Solver The guidelines and the validity and accuracy requirements for the Boussinesq Approximation also apply to two phase flows in the same way that they do for single phase flows However when a two phase mixture is present the Boussinesq Approximation i
34. he criteria ACE Suite V2011 0 Release Notes 11 CFD GEOM V2011 0 New Tip of the Day Dialog To inform users of critical changes to the GUI or to provide useful usage tips a Tip of the Day tool is available under the Help menu The user can optionally turn on off the dialog to display when CFD GEOM starts from within the dialog 12 Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 Corrected Problems The following is the list of issues addressed in this release gt In certain 2D cases triangle and or quad meshes exported to DTF using the Simplify option would produce files containing cells with negative volumes This issue has been resolved Issue related to surface splitting failure for certain type of surfaces has been resolved Under certain circumstances when outputting 3D meshes containing overlapping face entities an invalid DTF file would be produced only when the Simplify option was used not otherwise Such an attempt now triggers an error message and suggestions are made for fixing the problem Known Problems These are the known serious problems with the latest release Some or all of these problems may be corrected in a future release gt Updating Existing DTF Files Updating existing DTF files from models containing polyhedral zones i e coarsened blocks is not currently supported Only fresh DTF files may be written from models containing such grid types Un
35. hy trial and error processes on real prototypes ESI has developed an extensive suite of coherent industry oriented applications to realistically simulate a product s behavior during testing and real life use to refine manufacturing processes for desired product performance and to evaluate the effect of the environment in which the product is deployed ESI s products represent a unique collaborative and open environment for End to End Virtual Prototyping thus eliminating the need for physical prototypes during product development This solution allows a productivity gain innovation acceleration and significantly reduced costs For more information about ESI Group visit www esi group com About ESI CFD ESI CFD is a technology leader in the field of advanced computational fluid dynamics simulation software backed by more than 20 years of research based knowledge throughout a wide range of industries ESI CFD s broad range of products and services provide all of the necessary tools for advanced multiphysics analysis in a virtual prototype environment significantly reducing time and expense through comprehensive up front modeling and simulation Key focus areas include aerospace automotive biomedical fuel cells MEMS microfluidics plasma and semiconductor Contact Information for ESI CFD ESI CFD Inc 6767 Old Madison Pike Ste 600 Huntsville AL 35806 Phone 256 713 4700 Fax 256 713 4799 Software Support support cfd esi group
36. l produce a crash Running headless CFD VIEW on Windows 64 bit systems is currently not available 46 Release Notes ACE Suite V2011 0 AROUND THE WORLD ESI Group Headquarters 100 102 Avenue de Suffren 75015 Paris France T 33 OJI 53 651414 F 33 0 1 53 65 14 12 info esi group com EUROPE BENELUX amp SCANDINAVIA ESI Group Netherlands Radex Innovation Centre room 4 57 Rotterdamseweg 183 C 2629 HD Delft The Netherlands T 31 O IS 2682501 F 31 O I5 2682514 CZECH REPUBLIC amp EASTERN EUROPE MECAS ESI Brojova 2113 16 326 00 Pilsen Czech Republic T 420 377 432 931 F 420 377 432 930 FRANCE ESI France Headquarters Parc d Affaires Silic 99 rue des Solets BP 8012 94513 Rungis Cedex France T 33 0 49 78 28 00 F 33 0 1 46 87 72 02 ESI France Le R camier 70 rue Robert 69458 Lyon Cedex 06 France T 33 04 78 4 12 00 F 33 04 78 14 12 Ol SPAIN ESI Group Hispania He ers Parque Empresarial Arroyo de la Vega C Francisca Delgado 1l Planta 23 28108 Alcobendas Madrid Spain T 34 91 484 02 56 F 34 91 484 02 55 ESI Group Hispania S L C Balmes 188 Oficinas BI88 08006 Barcelona Spain T 34 93 152 10 25 F 34 93 218 01 01 AMERICAS USA ESI North America 32605 W 12 Mile Road Suite 350 Farmington Hills MI 48334 3379 USA T 248 381 8040 F 1 248 381 8998 ABOUT ES GROUP GERMANY ESI Gmb
37. le of options 1 Keep CFD GEOM V2006 installed and run your V2006 scripts through that version Your V2011 0 license will allow V2011 0 and all older versions including V2006 to run The V2011 0 versions of CFD ACE and CFD FASTRAN will read and use V2006 CFD GEOM generated DTF files with no problem 2 Convert your CFD GEOM V2006 script files to V2011 0 format This is a manual process of translating the V2006 script file to make use of V2011 0 script language In most cases it is just a matter of replacing the function calls with equivalent V2011 0 syntax and leaves all your program control structure in place ESI Group customer support staff can advise you on how to do this Running Older Versions The 2011 0 software can be installed with existing 2010 0 2009 4 2009 2 and earlier ESI software directories You will continue to be able to use old and new versions of the software which will allow as much time as needed for transition If you install 2011 0 software with existing 2010 0 2009 4 2009 2 or earlier software you must remember to modify your PATH so that the newest UTILS directory i e SESI HOME 2011 0 UTILS bin appears first in your PATH Then you may run older versions of the software using the runver version option For example on Linux systems assuming a Bourne type shell export PATH ESI_HOME 2011 0 UTILS bin PATH Bourne type shell syntax CFD GEOM runver 2009 4 runs 2009 4 CFD GEOM Appli
38. les 23710 Nodes 2 o Suppress Unsuppress Suppress Unsuppress buttons and Suppression status column in the Explorer ACE Suite V2011 0 Release Notes 21 CFD VisCART V2011 0 New Domain Marker Positioning Option To set the location of a domain marker a new option has been introduced that positions the domain marker at the center of the line joining two selected points or at the average center if more than two points are selected selected point 1 domain marker Selected points and resulting position of the Domain Marker Reduced VGD File Size The following enhancements implemented in this version will result in smaller VGD files gt Surface source storage has been optimized and thus VGD files with surface sources will be smaller in size than in earlier versions While saving the mesh in the VGD file users will see options that can result in a reduced VGD file size These options pertain to retaining the Cartesian cells as they are or converting them to Polyhedral cells before saving The extent of file size reduction with such a conversion is case dependant as explained in the user manual Reading and writing of gzipped VGD files VGD gz is now supported X Save As r File Type 34 Options VisCART Geometry J Enable 2004 0 62 compatibility C DTF Iv Save mesh if available cobalt Save Mesh Options C STL No Conversion C Nastran C Convert Cartesian Cel
39. ll size on the right surface is four times smaller than that of the one on the left notice that the common boundary between the surfaces has been meshed with the smaller size ACE Suite V2011 0 Release Notes 9 CFD GEOM V2011 0 Different cell sizes specified on adjoining discrete surfaces Discrete Surface Creation from Outlines Discrete surfaces may now be created by selecting the outlines of existing discrete surfaces The example below shows the original discrete surface in cyan and the interior blue surface was created by selecting the interior outlines in orange bordering the blue surface The tool which allowed creation of discrete surfaces from geometric lines remains available This function is not scriptable because discrete surface outlines are not geometric constructs Discrete surface creation from outlines 2 D Honeycomb Meshing The honeycomb meshing tool has been extended to support 2 D meshing on models consisting of triangulated trimmed surfaces lying in the XY plane This tool has been renamed from 3 D Honeycomb Meshing to simply Honeycomb Meshing When this tool is invoked it will determine the model characteristics and invoke the 3 D or 2 D mesher as appropriate In the scripting interface this capability is available through GMesh Generate2DHoneycombMeshes Modifications to CAD File Open Import The CAD file reading import dialogs have been modified to allow reading of SAT CATIA Pr
40. ls to Polyhedral Cells C Optimized for Disk Space Consumption r Specify Filename Directory C1 usr v A A cu 5 File Name OK File Filter VisCART vgd VGD x Cancel VisCART vgd VGD VisCART gzip File vgd gz VGD gz All Files Save Mesh Options and VGD gz support 22 Release Notes ACE Suite V2011 0 CFD VisCART V2011 0 Support for Reading Writing gzipped VGD NASTRAN and STL Files In addition to gzipped VGD files gzipped NASTRAN and STL files can also be read written directly with CFD VisCART V2011 0 This new feature provides great convenience when disk space is limited ACE Suite V2011 0 Release Notes 23 CFD VisCART V2011 0 Corrected Problems The following is the list of issues addressed in this release gt Issues related to and resulting from the existence of open cells in the mesh invalid mesh domain decomposition failures etc have been resolved by adding comprehensive protections and checks that prevent the creation of such cells Issues related to and resulting from the existence of duplicate points faces in the mesh invalid mesh domain decomposition failures etc have been resolved by adding comprehensive protections and checks that prevent the creation of such points faces Improved robustness of mesh generation in parallel mode has resulted in the resolution of certain issues encountered in this mode run failure ze
41. mposes the full gravity force vector in addition to the buoyancy force vector resulting in a superposed hydrostatic pressure field for two phase flows while this superposition is purposely omitted for single phase flows This difference between the treatments for the single phase and the two phase situations is dictated by theoretical requirements and should be borne in mind when visualizing the results of the pressure field results and also when applying boundary conditions on inlet and outlet boundaries New Full Anisotropic Material support CFD ACE users can now include full anisotropic material properties in their linear structural analysis In earlier versions anisotropic analysis was restricted to orthotropic materials only In addition users had to specify material properties in engineering form such as Young s Modulus Shear Modulus and Poisson s Ratios With this release the following enhancements have been made Users can now choose between Isotropic Orthotropic Anisotropic in older versions and Anisotropic material properties gt For Orthotropic materials users can now enter the elastic stiffness matrix directly or enter available engineering data such as Young s Modulus Shear Modulus and Posisson s Ratio gt Anisotropic materials can be specified using all 21 independent elements of the elastic stiffness matrix gt User subroutine capability has been made available to all inputs through the ustruct
42. n Compressibility corrections have been added to many of the turbulence models k k w SST k w Spalart Allmaras Detached Eddy Simulation and Delayed Detached Eddy Simulation The dilatation dissipation term is included in addition to the solenoidal or incompressible dissipation K e Model K w Model K e Corrected Model K w Corrected Model 150 125 100 75 Q w Q exp 50 25 0 46 0 48 0 5 052 0 54 0 56 0 58 06 0 662 0 64 0 66 x m Effect of compressibility corrections on heat transfer in a compression ramp CFD FASTRAN GUI CFD FASTRAN GUI V2011 0 includes all development that was required to enable or support the new features in CFD FASTRAN Solver ACE Suite V2011 0 Release Notes 39 CFD FASTRAN V2011 0 Corrected Problems There are no corrected issues in this release Known Problems The following are the known serious problems with this release Some or all of these problems may be corrected in a future release gt Solver o The unstructured Solver in parallel mode reports Forces incorrectly gt GUI o Importing a NASTRAN file may take longer on RedHat Enterprise 6 compared to other platforms o Drag and drop does not work on Windows 64 bit systems 40 Release Notes ACE Suite V2011 0 CFD VIEW V2011 0 Release Notes ACE Suite V2011 0 Release Notes CFD VIEW V2011 0 42 Release Notes ACE Suite V2011 0 CFD VIEW V2011 0
43. o E Parasolid Unigraphics and STEP as discrete models This option can be significantly faster when a non CAD model is sufficient In addition the generated solids will usually be water tight if sourious outlines are noticed then the Merge Nodes option can be utilized from the Discrete Surface menu The IGES reader does not support this option In addition when reading the above CAD formats in the traditional manner i e non discretely certain behavioral changes are likely For example periodic surfaces are no longer split into 2 surfaces instead the original topology is preserved This should help reduce the number of artificial small features that may have been introduced by earlier versions of CFD GEOM Such features can significantly drive up cell counts during mesh generation Moreover any spurs present in surfaces will 10 Release Notes ACE Suite V2011 0 CFD GEOM V2011 0 be preserved see Newly Supported Surface Topologies for more information Note that certain surface topologies are not supported by the IGES standard If you intend to export geometries for import into other systems you may need to export to SAT which supports all topologies that can be generated in or imported into CFD GEOM Even then there is no guarantee that downstream applications will support all possible topologies Improved IGES Reader The IGES reader will now process shells and solids present in files which follow the IGES 5 3 specifi
44. oes not work on Windows 64 bit systems ACE Suite V2011 0 Release Notes 35 CFD ACE V2011 0 36 Release Notes ACE Suite V2011 0 CFD FASTRAN V2011 0 Release Notes ACE Suite V2011 0 Release Notes CFD FASTRAN V2011 0 38 Release Notes ACE Suite V2011 0 CFD FASTRAN V2011 0 New Features and Improvements CFD FASTRAN Solver CFD FASTRAN Solver V2011 0 includes the following new feature Compressibility Corrections for Turbulence Models Historically compressibility has been considered to have a relatively small effect on wall bounded turbulent flows and is accounted through mean density variations However at high Mach numbers compressibility corrections are needed to get a better correlation with experiments Specifically the effects of compressibility on the dissipation rate of the turbulent kinetic energy are not accounted for in current models These result in the over prediction of the spreading rate of shear layers heat transfer rates and eddy viscosity For compressible flows two extra terms known as the dilatation dissipation and the pressure dilatation occur in the turbulence kinetic energy equation The pressure dilatation term is usually neglected because its contributions are believed to be small At present there are seven turbulence models available for CFD FASTRAN They are Baldwin Lomax k e k w SST k w Spalart Allmaras Detached Eddy Simulation and Delayed Detached Eddy Simulatio
45. ration was supported only in serial mode In V2011 0 boundary layer generation for single domain meshes is supported in parallel mode as well This enhancement will significantly improve turnaround time for mesh generation Boundary Layer generation in parallel mode Limitation As thin walls are not supported in parallel mode the benefits of this enhancement can be realized for single domain meshes that do not include thin walls Support for Boundary Layer Generation on Thin Walls Boundary layer generation capability has been extended to handle thin walls Boundary layers are grown on both sides of the thin wall as shown in the following image for a thin wall heat shield top view bottom view Boundary Layer generation on Thin Wall ACE Suite V2011 0 Release Notes 17 CFD VisCART V2011 0 Limitations e The boundary layers will gradually terminate at the edges of the thin wall e As thin walls are not supported in parallel mode this enhancement is limited to use in serial mode New Local Thickness Specification for Boundary Layer Generation When the surface mesh size is not uniform and varies considerably through the model a constant thickness specification for the boundary layer may not always be suitable or sufficient In this version a new boundary layer growing method Local Thickness is available together with the original and previously available Absolute Thickness method The Local Thickness method allows
46. ro cells in a zone etc Cell count balance between the various processors or zones in parallel mode has also been improved Improved robustness of thin wall handling has resulted in the resolution of certain issues meshing errors for thin walls with T junctions domain decomposition failures thin wall preprocess failures poor preservation capture at wall thin wall intersections etc Protection has been added to hide the option in interactive mode for saving Shrinkwrap mesh in the VGD file as this is not supported Warning message is written out for the same in batch mode Known Problems These are the known serious problems with the latest release Some or all of these problems may be corrected in a future release gt Projected Single Domain mesher takes much longer to complete mesh generation if Feature Preservation is activated and the final mesh quality may not be as good as the one generated without Feature Preservation The Multi Domain mesher may encounter problems in handling a domain interface if two surfaces are present at that location but they don t match exactly Several CAD import options Parasolid UG Pro E Catia V4 and Step are available on 32 bit Linux platforms but not on 64 bit Linux platforms This limitation is expected to be removed in a future release 24 Release Notes ACE Suite V2011 0 CFD ACE V2011 0 Release Notes ACE Suite V2011 0 Release Notes CFD ACE V2
47. s option which was limited to the Single Domain and Shrink Wrap meshers in earlier versions is now available with the Multi Domain mesher as well 20 Release Notes ACE Suite V2011 0 CFD VisCART V2011 0 New Preserve Boundary Between Two Patches Option If two adjoining patches are coplanar or have a very small dihedral angle between them the boundary between these patches may not be properly captured with the existing Preserve Features option In V2011 0 a new option Preserve Boundary Between Two Patches has been introduced for this purpose Also in addition to capturing explicit boundaries boundary between adjoining patches this option enables capturing of implicit boundaries intersection of overlapping parts etc as well Limitation This option is only available with the Single Domain mesher 2010 0 2011 0 Improved preservation of coplanar patch boundaries and implicit boundaries in V2011 0 New Suppress Option for Surfaces Domains Sources and Gaps This new option allows geometry surfaces sources domains and gaps to be suppressed Suppressing an entity makes it invisible to the mesher during subsequent mesh generation This means that although the entity remains in the model and continues to be visible to the user it does not participate in any meshing operations This option should make case studies more convenient Suppression status L3 Geometry s Number of Geometries 237 25280 Triang
48. uite V2011 0 Release Notes 45 CFD VIEW V2011 0 Corrected Problems The following is the list of issues addressed in this release gt gt In certain cases selecting multiple zones including polycell and non polycell zones and creating a point or line probe to analyze cell center data would result in incorrect behavior or abrupt session termination This issue has been resolved An abrupt session termination would occur when the object say an Iso surface on which a MinMax Probe is created would disappear during an animation for example Protection has been added to prevent such a termination Issue related to Carpet Plot not getting colored according to selection has been resolved If the range of values for the Plotter X Axis was 0 1 or less tick marks would disappear This issue has been resolved Known Problems These are the known problems with the latest release Some or all of these problems may be corrected in a future release gt gt When cell center data is imported the SetProbeVariable scripting function applied to the MinMaxProbe operator does not work for coordinate variables Some system fonts are not available in headless mode when running on a Linux Unix system without a running X Server e g running on a node in a remote cluster With a running X Server the issue goes away On Windows 32 bit systems and in headless mode only saving the image of a model where a plane cut is present wil
49. ural property subroutine template This includes the engineering data components in each direction and the stiffness matrix itself User subroutine capability has also been made available for specifying material axes through the udirection subroutine template This allows users to fully control the material axes direction on a cell by cell basis ACE Suite V2011 0 Release Notes 31 CFD ACE V2011 0 The stiffness matrix for a 3D case is of the form C 1 C 2 C 3 C 4 C 5 C 6 Cas C oi eus Coo Ciz Cu Cy C5 C5 C5 Cr C yyy C Ayzz C yyyz C VYXZ C yyxy C 3 C C 5 Cis lt gt Cz Cu Coe Co sym C4 Cas Cag sym Co C yzxz C yzxy Css Css C ox Cay Cas eon Note that the order in CFD ACE xx yy zz yz Xz xy may be different compared to material data available in the literature xx yy Zz Xy Xz yz These enhancements were developed and implemented in collaboration with Drexel University New Plasma User Subroutine Options In CCP and ICP applications an option to set the source terms in the model can be very useful With this in mind the current implementation has been improved to allow users to set source terms through a usource type of user subroutine for the following Electron Temperature and Electron Density equations for CCP models gt Electron Temperature equation for ICP models Additional CCP output Capacitively Coupled Plasmas or CCPs are often used in the semiconductor industry to s
50. ustain etch and deposition processes involved in the manufacture of chips While simulating such applications users need to be able to gain as much insight as possible from the data generated from their simulation runs Towards this end additional CCP outputs are now available using either input options in the GUI Out gt Graphic or via the Special DTF update option The additional outputs are gt Cycle averaged electric fields gt Cycle averaged species fluxes gt For volumetric mechanism writing to DTF output of the forward and backward volumetric reaction rates in additional to the net reaction rate in case of reversible reactions has been enabled via special DTF update command gt For surface reaction mechanisms writing to ascii text file output CVD RATES of forward and backward surface reaction rates in additional to the net reaction rate for surface reaction mechanisms has been enabled via special DTF update command gt For surface reaction mechanisms writing to ascii text file output CVD FRXN of the details of the contribution of individual surface reaction steps to the overall deposition or etch rate has been enabled via special DTF update command gt For surface reaction mechanisms writing to ascii text file output CVD FSPC of the details of the contribution of individual bulk species to the overall deposition or etch rate has been enabled via special DTF update command New Gas Species Mole Fraction Output
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