FlowVision Help
Contents
1. RO WMISTONEROWUISIONEEL Flow Vision Version 3 09 04 User s guide CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help 1 Contents 1 Quick start 2 1 1 Example of a problem mixing a liQuid ssescssssssscssssesesssssseessseseceeseeseeassarsesaesansesaeeass 3 1 2 Loading a geometric model of a mixer 4 1 3 Operations in the View WINdOW nnnnnnnssnnnnmnrneereerennennesneseresnesnesnnenesenesneesneanese 7 1 4 Defining general settings of the project cesssssssssssscsessessessessessessneseesersneeeseesenseneenees 10 1 5 Defining Substances and their parameters 12 1 6 Defining Phases and their parameters 15 1 7 Defining a Model and its parameters 17 1 8 Indicating a Model in calculation subregion eesesssecseeseeeseeeseeeceeeseeeenseeeseaseeeeseesneeees 18 1 9 Defining Boundary CONITIONG ccsccecescsscssssesscssseseesssanseesecaeeeesecseeaesaesesatsaesesassanseeaeeats 19 1 10 Defining initial CON CINOWS 5 sise nn ne nn nn cence ne 24 1 11 Defining a Computational grid 25 1 12 Defining simulation Controls 2er nmenoneiesnnnn rennes oatennoncts 30 1 13 Displaying FOS US msn cn anse nue rss nn ne ar sente ne dites teen 33 1 13 1 Creating charachteristics iii 36 1 13 2 Creating layer S nininini a a aaa aaa a aaa iaa a Eaa aa aariaa Seaain i 38 1 14 Carrying out the project calculationS sssssususunununununun2. To be adaptedto theboundary conditions follow these steps In thePropertieswindow Boundary conditionsincludingadaptationand set its parameters For this tabPreprocessorproject tree select the folderSubregions gt subregion 0 gt Boundary conditions gt Walland itsPropertieswindow set the options a setAdaptation gt Enable Yes select from the list b setAdaptation gt Max Level 1 c setAdaptation Layers cells 2 CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 28 The task of adaptation at the Facility To specifyan Adaptationto theobject follow these steps Set theobjectin the folderObjects 2 Createan Adaptation N folder Adaptation correspondingSubregion ls Set the parametersAdaptations CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 29 For in this example mixer Set adaptation level 1 near the surface on which the identified boundary conditionWall e In the properties of the boundary conditionsset Wall Adaptation Cell Layers CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 30 1 12 Defining simulation controls Setting calculation is carried out on thetab Solver The main control parameters calculation includes the step of integration of the model equations in time and stop conditions calculation Specifying the time step The time step is set in thePro
3. Values of thesephysical propertiesofthe substance are defined in thePropertieswindowsofappropriate child elements Parameters of aSubstance in the projectcan be defined manually or loaded fromtheSubstance Database The number of substances may be one or more We define the physical properties of the current environment which in this project is a single phase and consisting of one substance water considered as an incompressible fluid Setting substance Right click the folder rowSubstance 0 and then clickLoad from SD gt Standard Downloaddialog box is displayedfrom the database Load from database Substances Phases SelectWaterin the drop down listand the value ofLiquidSubstancesin the drop down list Phases then clickOK In the folderSubstancesshows the new elementWater_Liquid Expand elementWater_Liquid Displays a list of physical properties of matter E ja Substances B water_Liquid MAI Molar mass P Density LU Viscosity Thermal conductivity C Specific heat h Enthalpy of formation T Boiling temperature O Surface tension B Compressibility factor Conductivity E Permittivity To view the specified properties for example viscosity a scroll to theviscosity ofthe list of the physical properties of the substance in thePropertieswindowdisplays theviscosityparameter CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 13 b In thePropertieswindow cli
4. Outlet Preprocessor Solver Postprocessor Viewport B PN Region General settings hi Substances Phases Models DA Local frames of reference Ap Objects CT Computational space A Supergroup on Outlet t B Characteristics 0 Supergroup on Outlet H ES Geometry fo Sliding surfaces B Characteristics Z Internal characteristics AE Characteristics 0 Supergroup on Outlet Select the elementCharacteristics O in thePropertieswindow select the valuefor the parameterHighCharacteristics gt Variableand clickApply To set the stop condition for calculating the criterion on the basis of characteristics Open the tab Solver context menu item Break conditions gt Custom valuesand select the commandCreate E S Stopping conditions T Time span 09 Time steps 6 Residuals User valuga Create Properties In the project tree is added created a stopping criterion in our example an element ofa stopping criterion Oin the folderBreak conditions gt Custom value amp Stopping conditions Time span oo QP Time steps t6 Residuals Stop criteria 0 Select the itemstopping criterion 0 in thePropertieswindow do the following selectCharacteristics Ofor the parameterobject select lt fweight gt for the parametervariable thereby setting the calculation of average cross section of the outlet temperature of the waterflowingthrough the outlet a select a value o
5. an animation Animation is created from a set of graphic files created either during the account or when viewing saved data These image files contain the image of the window View Here is how to create animation in thePre Postprocessorduring counting Note Similar opportunities are also available in animation Viewer Creating animation during counting Set the layers the image which you want to save On the layers is recommended to setRange Manualto the range and accordingly the color of layers depending on the displayed variable values did not change from step to step Press E Start Capture sequence Begin sequence in the toolbar Pictures Dialog box opensImage Capture 932 Height 775 IV Keep original proportions M Antialiasing cms Ask in thelmage Capturesettings size elimination of aliasing ClickOK For a detailed description of the elements of this window see Section Management of capturing images This opens the standard Windows operating system to access the files Savelmage Specify the location type and name prefix for the files that will be written to the image Then click theSave button Images will be written to the file at each updatewindowView The file names are formed as follows Prefix _00000 Filetype Prefix _00001 Filetype Prefix 00002 Filetype Create a video from a sequence of image files saved with the help of a specialized program The flow in the mixer Create ani
6. history you can view intermediate results through the toolbar Navigation and creating animations By the toolbar Pictures with the mapping of the dynamics solutions in time Elements to display the results should be chosen depending on the type of the display data Data Type Name of the element Integral values Variable value on the surface and in the bulk Characteristics Local values Local values of the scalar variable along the line Layer Plot along line Layer Plot along curve Layer Plot along ellipse Local values of the scalar variable at the surface Layer Color contours Local values of the scalar variable in the amount of Isosurface VOF Only for variable VoF see section Theory gt Physical Processes gt Transfer Local value and direction vector variable on the Layer Vectors surface and in the bulk Layer Streamlines and element Emitter Displaying various values Variable in A Variable in the The value of EET Feature Layer the Properties Data window window Integral values The flow through the SupergroupCreate Characteristicsin the Any list Mass flow input or output d on the surface of corresponding the input or output Supergroup Mass flow Volumetric Flow Volumetric flow the section correspondingplanes section correspondingplanes The average Plane section Characteristicson the Temperature lt fmass gt temperature of the correspondingplanes lt f ma
7. on the screen will display the next group of facets which lies under the point click if available To display the entire geometric model set the mouse pointer in theViewwindow is a geometric model and click the left mouse button Cross section of a geometric model of the plane In order to cut off a plane geometric model of the computational domain Perform the following two conditions plane should be cutting which Postprocessor tab right click the line3D scene gt Objects gt Plane Oand set the mark in the paragraphto the View geometric model of the computational domain must be cut off whichPostprocessor tab right click the line3D scene gt Objects gt Computational space gt Solids and check the box in paragraph Apply clipping Highlight tab Postprocessor line 3D scene gt Objects gt Plane 0 In the Viewwindow visible plane the reference point on it and coming from the reference point of the vector normal to the plane It can be seen that the plane cuts the negative half space the normal vector in the positive half watching To change the position of the plane with the mouse En Press ee to select Edit object 2 Highlight tabPostprocessorline3D scene gt Objects gt Plane 0 To rotate the plane around the reference point click the left mouse button and keep it pressed move the mouse pointer a To move the reference point along the plane right click and hold and drag the mouse To move the referen
8. select the CreateLayer In the dialog box select the valuefor the parametervectorstype layerand clickOK Repeat steps1 4for the elementObjects gt Plane 2 In the project tree displays created four CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 40 Preprocessor Solver Postprocessor viewport E s 3D scene few Physical variables E he Objects CT Computational space 4 Supergroup on Outlet 3 7 Plane 1 G Color contours 0 Plane 1 2 Vectors 0 Plane 1 317 bol Color contours 1 Plane 2 12 Vectors 1 Plane 2 A B Characteristics 3 Internal characteristics 5 Characteristics 0 Supergroup on Outlet H L User variables Materials El Layers xyz Coordinate system n t fc Color contours 0 Plane 1 ti Color contours 1 Plane 2 ty Vectors 0 Plane 1 ty Vectors 1 Plane 2 Set the parameters of both layersColor contours highlighting an item in the project tree and performing the following steps in thePropertieswindow a selecttemperaturefor Variable gt Variable b selectManualfor settingrange gt Mode c set values of70andOfortheparameterrange gt High andRange gt Minimum respectively and clickApply Set the parameters of both layersvectors selecting an item in the project tree and performing the following steps in thePropertieswindow a selectVelocityfor Variable gt Variable b specify a value of21
9. tuned so it can occur automaticallyat system startup If necessary License Managercan be started manually via theStartbuttonWindows Start gt Programs gt FlowVisionLM gt License Manager or run it executable FvLicense exeWindows orFvLicensein Linux Select main menu Choose File gt New The standard window for selecting a file Select the fileMixer wrl located in the folder e C Program Files TESIS FlowVision HPC Tutorial Samples Geom e orc Program Files x86 TESIS FlowVision HPC Tutorial Samples Geom Dialog box to specify the name and location of the project Saving the project x New folder name Project location C Documents and Settings krasnov My documents Fy co Specify the name of the project in it in thename of the new folder and if necessary the location in theLocationfield then clickOK In the client part of the project will create a subdirectory of the project that contains the client files of the project In the Project Tree tab Preprocessor appear loaded elements of the project After you create a project in the treePreprocessorerror messages are displayed in the geometry marked with e load geometry to another Tolerance e in the context menu Region clickFix self intersection e Use to correct errors in the geometry of a specialized package for example 3DTransVisia Loading a previously created and saved projectFlowVisionvia File gt Open where in the dialog bo
10. ails on the calculation of the project start stop and continue the calculationsee in section Start stop and continue the calculation of project The following describes the launch of the calculation of this example For in this example mixer Run the project on the computation of pre postprocessor e Log onSolver Agent o Press in the toolbar o In the next window enter the user name and password on theSolver Agent e Project to the solver o Press 4 in the toolbar o In the window that appears set the parameters of theSolver o RunSolver o Highlight runningSolverand click Connect RunSolverin computation o Press E gt in the toolbar o In the window that appearsStarting solveremove all tags If necessary stop computation via buttons in the toolbar CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 43 1 15 Monitoring the project calculation process The main methods of control in the process of calculation of the project are as follows e basic control parameter calculation including graphics predetermined stop condition calculation in the Monitor e imaging layers constructed in the course of computation e control characteristics in the information windowInfo Control of the main parameters of the calculation in the Monitor Select the display mode of theMonitorwindowand follow in the course of the calculation a Statusmodeto track changes of the following parameters e numb
11. ame plane and two on the other In one layer couples the temperature field to be displayed in the other the velocity vector In order to set thelayer e Create apreprocessor orPostprocessor Objectand set its properties e Create alayerto the created object To create planes Open the tabcontext menu itemPostprocessorObjectsand select the commandCreate A dialog boxCreate new object CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 39 Cancel Select theObject typefieldvalueplane and then clickOK In the project tree is added to create a plane Plane 1itemin the folderObjects which coincides with the desired of the mixer Open the context menu on the elementplane 1inObjectsfolderand selectCopy In the project tree the plane planeelement 2in the folderObjects Scroll to the elementplane 2and in thePropertieswindow do the following a clickObject gt Operations gt Y and clickApply plane will be horizontal b select0 005for the parameterobject gt reference point gt Y and then clickApply horizontal plane passes through the axis of the underwater tubes Open the context menu itemObjects gt Plane 1in tabPostprocessorand select the CreateLayer Dialog box opens Create new layer Create new layer Layer type ee Objects Plane 1 x OK Reset SelectColor contoursfor the parametertype layerand clickOK Open the context menu itemObjects Plane 1and
12. ange the boundary conditions as indicated below S x gt e Set the parametersof the boundary conditions o Boundary 1 Type l Wall a Zero flow a Value in cell near wall Value in cell near wall o Boundary 2 Typed SE Pt Ic RE eee Vale 0 im ry 3 Type OoOO Inlet Outlet eae ee CI p P Value PO m o Boundary 4 we O o O ew foes S DE D A SE VE D M 9 E ni ir MurbEnengy Zero gradient TurbDissipation Zero gradient FlowVision Help Quick start 23 CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 24 1 10 Defining Initial conditions Initial conditions this field values calculated variables in a given object initial time By default all variables except forthe phase volume at the initial time are zero Variablevolume phasehas a default at the initial time value of1 Set the initial conditions only if you want to start calculating with the values that differ from those used by default zero for all variables except forthe phase volume and a value offfor the variablevolume phase Initial conditions are defined in aSubregion In order to set thelnitial conditions e Set theModel Initial data o Createinitial data o Assign values to create an initialdata e Set theProperty Create anobjectfor the application ofthe initial conditionsin the folderObjects o Set the parameters of the object Set thelnitial
13. bar Modes to select the conversion type and choose the most convenient angle for the analysis of the flow Control characteristics in the information box Info Highlight the project tree line characteristics and then click i See the information box in the toolbar Modes Window opensInfo Fig 3 5 with the parameters characteristics para 7 6 1 calculated on the last time step their values are updated at the end of the next time step CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start Solver data Step number Time Variable Block Phase Subregion Area Mass flow Mass flow Volume flow Volume flow Integral X Integral Y Integral Z lt f surf gt lt f mass gt lt f mass gt lt f mass gt Mass flow lt f mass gt Mass flow Surface dispersion Flow dispersion Heat flux F fluid x F fluid Y F fluid Z M center X M center Y M center Z M fluid gt M fluid Y M fluid Z Autorotation freq 45 Present 785 0 785 TEMP Heat transfer All phases SubRegion 0 7 77 760044871 3e 005 0 0 15555487273042 D 0 00015601558675811 34 939325966927 5 4349824040719 D 34 939325966927 0 0 3 9208591628321 e 005 1 7047414671125e 013 2 1049181482543e 014 Fig 3 5 Information window info with parameters Features 0 CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 46 1 16 Creating
14. ce point along the normal to the plane press the left and right mouse button and hold it move the mouse pointer CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 9 Changing the position of the plane with the help of the window Properties In thePropertieswindow follow these steps for the orientation of the plane along the axis X Y 2 clickObject gt Operations gt X YZI And then clickApply to change the orientation of the plane on the opposite clickObject gt Operations gt and then clickApply CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 10 1 4 Defining general settings of the project Some of the common parameters include values such as e reference temperature T andpressureP default is 0 C and 101000 Pa e vectorof gravitational accelerationin the absolute coordinate system associated with the geometric model of the computational domain gravityvector In the example in the figure given the acceleration of gravity 9 8 m sin the directionagainst theaxis Y e g point the coordinates in the absolute coordinate system the point at which a hydrostatic pressure component vanishes e g density densityof a heaw fiuid situated above the g point as if the layers of a heaw fluid is not specified then the lower g point whichcontributes to the hydrostatic component of the pressure ref Some of the general guideli
15. ck on theValuefield on the field itself for data entry and then on the icon EA Tabledialog box is displayedf x with a tabulated function of the viscosity of the pressure X and temperature Y 101325 273 15 0 00182 101325 283 15 0 00133 101325 293 15 0 00102 101325 303 15 0 000817 101325 313 15 0 000666 101325 323 15 0 00056 101325 333 15 0 000479 101325 343 15 0 000414 101325 353 15 0 000362 101325 363 15 0 000321 0 oo Jim BR CO De c close thetable Specify a value of zero Enthalpy of formation this option is only used in the model of mass transfer with chemical reactions or burning a highlight enthalpy of formation of the list of physical properties of the substance b In the Properties window click the mouse pointer on the row value and then click on L c drop down list select Constant CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 14 d inthe input box set the value to 0 and then click Apply Roback Dimension J kg Value D 123 v For reference physical properties of water Physical propert The value of The dimension of 1000 0 001 Thermal conductivi 06 womg Specific heat 4217 J kgK CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 15 1 6 Defining Phases and their parameters Phase a set of agents and the simulated physical pr
16. conditions o Create afolder in thelnitial conditionsinitial conditions in aSubregion o Set the parameters oflnitial conditions For in this example mixer The initial conditions is not required Notes MSomeinitial dataare always created in the default model 2Computational spaceobjectis always created in the folderObjectsby default 3 Somelnitial conditions containing theinitial data Oand toComputational space are always automatically createdin aSubregion Assignment of non zero initial conditions is useful in order to accelerate the convergence of the solution for example in the problems of external flow is convenient to define the initial velocity field corresponding to the free stream velocity CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 25 1 11 Defining a computational grid Computational grid a set of cells into which the computational domain The values of variables within a single cell constant Specifyingthe computational gridincludes e Entering thestarting grid e SpecifyingAdaptation Specifying the computational grid consists of two stages a specify the start grid In this example set the initial uniform computational grid ie with constant steps of each of the coordinates with a number of steps Ny 20 Ny 20 N7 30 b job adaptation and adaptation to solution In this example set adaptation local refinement of the computational grid near the boundar
17. d Oand 1 Login cold Select the itemLogin cold Oin thePropertieswindow e specify a valuefor the parameterincludes a hotname e ClickAppl Select the itemLogin cold 1in thePropertieswindow e Freeselectoutputtypesetting e set theoutputvaluefor the parametername The alignment of the boundary conditions on the groups of facets The alignment of the boundary conditions on the groups of facets produced enumeration groups and indicating for each of them the desired boundary condition Because all groups of facets is already a boundary conditionWall remains only to change the boundary conditions at the inlet and outlet sections of the tubes CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 21 If the itemsin the folderSubregions gt subregion 0 gt Geometry gt Region Surface 0 gt Region Group Ndo not appear in the project tree adjust their display in basic settings FlowVision Open the menu command File gt Preferences setting the Display gt Show All Select the itemSubregions gt subregion 0 gt Geometry gt Region Surface 0 gt Region Group 1 and in thePropertieswindow selectOutputparameterboundary condition and then click Apply Select the itemSubregions gt subregion 0 gt Geometry gt Region Surface 0 gt Region Group 6 and in thePropertieswindow selectLogin coldparameterboundary condition and then click Apply Select the itemSubregions gt subregion 0 gt Geome
18. data 0 Phase volume Phase 0 Temperature Phase 0 Pressure Phase 0 Pulsations Phase 0 Turbulent scale Phase 0 f Velocity Phase 0 f you highlightin the project treeelementinitial value of variable then in thePropertieswindowdisplays the value of the initial data which by default is zero This means that initially the liquid in the tank is at rest and at a temperature equal to the reference value i e 0 degrees Celsius For in this example mixer Ask aModel e Inthe context menu selectCreate afolderModels e InPhasesin theModelsfolder 0 OaddPhase o In the context menu of a folderModel 0 gt Phases clickAdd Remove o In the form select otryvsheysyaPhase 0 and then clickAdd CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 18 1 8 Indicating a Model in calculation subregion We indicate the model estimated subregions ie subregions which will be calculated not doing it for the off design subregions To specify the model in the computational subregion Poa Select the folder in the project tree Subregions gt Subregion 0 In its Properties window set the parameters of the Model by selecting from the drop down list select Model 0 L s ok appr CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 19 1 9 Defining Boundary conditions Boundary condition the condition impos
19. del can not be ClickApply Specified items phase displayedin the project tree ER Phases Ee Sas Phase 0 i El PE Substances Water_Liquid a IIR vo t Heat transfer J Turbulence CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 17 1 7 Defining a Model and its parameters Model a set of phases and phase interactions Models are createdin the foldertreePreprocessormodels The project should be at least one model Number of models is not limited In the presence ofseveralphasesin themodelscan be specifiedinterfacial interaction At this stage the formation of the project will determine which phase is included in the model and define the initial data which later will be given the initial conditions for the model equations Setting Model Open the context menu of the foldermodelsand select theCreatecommand In the folderModelsfolder is displayed new elementModel 0 ExpandModel 0 right click the lineand select thefolderPhasesitAdd remove Dialog box clickthe phase Select the desired phase in the left listUndrawn in our case Phase 0 and then clickAdd The selected phase is displayed in the right listselected ClickOK In the folderis displayedPhasesadded element Initial folder data gt Setup data Odisplays a list of items nitial value of variable E Models a 5 gt Model 0 Phases 532 Phase 0 Phase interaction fx Init data Xo Init
20. ed on the design variableson borders of aSubregion Boundary conditionsare specified in the folder Boundary conditions in an appropriateSubregion When loading a geometric model of the computational domain model surface is divided into groups of facetsRegion Group N listed on thePreprocessortabin the folder Subregions gt Subregion 0 gt Geometry gt Region Surface 0 see illustration If you use the default settings elements Region Group N do not appear in the project tree folders Subregions gt subregion N gt Geometry gt Region Surface N because in real problems it can lead to tens or hundreds of elements Region Group N To display the Region Group N set in the basic settings Display gt Show All Groups Yes a M SubRegion 0 L Boundary conditions S B Cond 0 Temperature Phase 0 gt Velocity Phase 0 g TurbEnergy Phase 0 gt TurbDissipation Phase 0 al Geometry Region Surface 0 AA Region Group 0 AA Region Group 1 AA Region Group 2 AA Region Group 3 AA Region Group 4 44 Region Group 5 AA Region Group 6 AA Region Group 7 AA Region Group 8 H DE Initial conditions Fig 3 2 Folder Subregions in the project tree In order to place the boundary conditions on these groups of facets you must first create them in a folderSubregions gt subregion 0 gt Boundary conditions Whe
21. er of iterations which should not significantly increase strong growth means instability account e Algebraic residuals that must be within a predetermined accuracy of calculation e functional residuals which should eventually decrease to a low value corresponding to steady flow or oscillate with a limited amplitude b Plotmodeto track the changes of the control parameter over time see figure Stop criteria 0 l fs efe ol amp Data 3 40 a 30 20 10 0 0 0 2 0 4 0 6 0 8 Time User stopping criteria Displaying a dependency ofthe control parameter from time to time in the Monitor Displacement or stretching of the scale of the axes graph Move the mouse pointer to the line axis of the graph Release the left mouse button After changing the shape of the pointer press the left mouse button and keep it pressed move the mouse pointer along the axis Visual inspection of the project calculation 1 Press Tum on off the external surface in the toolbar Solids to make transparent object boundaries which enclose the interior space This allows you to see the layers on the intersecting surfaces see Figure CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start on E Z LELU S Displaying a field of temperature and vectors of velocity on layers and an intermediate time point b final result 2 Press view transformation mode in the tool
22. f 0 for the parameterlevel that is computation will be interrupted unless the characteristic will be constant over time And clickApply CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 38 If you select lt fweight gt it would mean computation for the water flowingthrough the outlet that would have led to a null result For in this example mixer Create Characteristics for Supergroup the corresponding boundary conditions outlet e Create based on the boundary conditions outlet a Supergroup in Postprocessor e Create Characteristics for Supergroup e In the Properties window Characteristicsset Characteristics ____Wariabte variable Temperature e In order to maintain the momentum of change of temperature in the file before the start of the calculation set Save to File 1 13 2 Creating layers For visual inspection of the calculation will follow the velocity vectors and temperature in the two sections of the mixer To do this follow these steps First you need to create two planes e one of them the vertical plane of symmetry of the mixer e second the horizontal plane passing through the axis of lead pipes Further these planes define layers that define the mapping in a color temperature of the fill and the speed in form of vectors Each layer displays a certain way only one variable and only one object It is therefore necessary to create two layers on the s
23. for the parametersGrid gt GridSize 1and gt 2 Size c selectManualScaling gt Mode and clickApply The layers are defined in the folder Layers inPostprocessoron the basis of pre createdobject CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 41 For in this example mixer On 1 MN CH AAM Aa 0 0 NU The flow in the mixer Ask two layersColor contoursfor the variabletemperature one on the plane crossing the inlets and the other on the plane of symmetry of the mixer e Create twoplanes e In theProperties windowof the firstplane is given by o Objects gt Reference point gt X 0 o Objects gt Reference point gt Y 0 005 o Objects gt Reference point gt Z 0 o Objects gt Normal gt X 0 o Objects gt Normal gt Y 1 o Objects gt Normal gt Z 0 e In theProperties window the secondplane is given by o Objects gt Reference point gt X 0 o Objects gt Reference point gt Y 0 02 o Objects gt Reference point gt Z 0 o Objects gt Normal gt X 1 o Objects gt Normal gt Y 0 o Objects gt Normal gt Z 0 e Create Layers ofColor contourson bothplanes e In theProperties window setofLayers Variable gt Variable Temperature e In order to display thetemperaturein the same scale on both layers specify o Range gt Mode Manual o Range gt Maximum 70 o Range gt 0 Maximum FlowVision Help Quick start 42 1 14 Carrying out the project calculations Det
24. ies of the region adaptation to the solution not to ask Defining an initial grid The initial grid is defined in dialog windowProperties of the initial mesh In order to setuniform Starting grid e In thePropertieswindow specify the numberof initial gridcells in each direction in the respective nX nY nZ In order to setan uneven Starting grid e In the Properties window of the Initial grid element call one of the Initial grid editors clicking on EE or New e In the window that appears the corresponding Initial grid editor set grid options BE ei bd je 24 TN PEN PP P The flow in the mixer Ask a uniform initial mesh 20h20h30 e In the Properties window set the initial grid nX 20 nY 20 nZ 30 Perform the following steps CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 26 Actions On the Advanced tab scroll to the folderPreprocessorlInitial grid Inthe Viewwindowshows the computational domain in the box Inthe Viewwindowshows the picture constructed initial computational grid CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 27 Specifying adaptation near the borders of the area Adaptation a partition of grid cells in each direction in half the specified number of times Level of adaptation the number of consecutive partitions mesh Adaptationcan be defined on theboundary conditions or at thefacility
25. lues of user variables is displayed in theMonitortabPlot The flow in the mixer Set thelength of time Staring a stp h Note Specifying Conditions shutdown is not necessary for the calculation Setting the control calculation for this example Solvertab scroll to thetime step and in thePropertieswindow set the options Selectavaluein secondsfor theprocessparameters set the value of0 01for theconstantparameterstep CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision FlowVision Help Quick start eee 32 Quick start 32 J i On the Advanced tab scroll to theSolverBreak conditions gt The length of timeand in thePropertieswindow set the value ofparameter1Stop CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 33 1 13 Displaying results Displaying calculation results visualization is provided inPostprocessorusing Characteristics and Layers The conditions under which the mapping may depend on the manner in which the preservation of the results was carried out in the form of data or in the form of layers If carried storing data to display the results obtained it is necessary open a project inPre Postprocessor e connect toSolver e if necessary to synchronize the client and server parts After that thePre Postprocessorwill display the last saved data If necessary you can create additional elements Postprocessor If the data is saved to the
26. mation in the process of changing the account of thetemperaturedistributionin the planes described in the example in section Creating layers CAPVIDIA 1999 2015 Leuven Belgium All rights reserved
27. n loading a geometric model of the computational domain in this folder are automatically created only one boundary conditionB Cond 0 thermally insulatedWall By the boundary conditions are placed in groups more facets After placement of the boundary conditions and finding the surface area of each boundary condition are given by the value of the boundary conditions Create boundary conditions Scroll to itemB Cond Oin the folderSubregions gt subregion 0 gt Boundary conditions in thePropertieswindow set the valuefor the parameterWall s nameand click Apply CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 20 Open the context menu of a folderSubregions gt subregion 0 gt Boundary conditionsand select theCreatecommand In the folder is added to itemB Cond 1 Scroll to itemB Cond 1and in thePropertieswindow e selectInlet OutletType setting e specify a valuefor the parameterCold inletName e click Apply Properties window Apply f Rollback Cold Inlet Inlet Outlet none Enabled No Max level 0 Cell Strata 1 Ata fnrafnn arm Count 4 Temperature Phase 0 Value Velocity Phase 0 Normal mass velocity TurbEnergy Phase 0 Pulsations TurbDissipation Phase 0 Turbulent scale Make two copies of the boundary conditionLogin cold opening the context menu on the elementLogin coldand selecting theCopy In the folder are added elements includecol
28. nes of the project also includes the definition of the layers of a heaw fluid below the g points each of which is characterized by the following parameters e g thickness the thickness of a heaw fluid e g density densityof a heaw fluid in a given layer lower layer and if the next layer is not defined The General settings are specified in the Properties of the element Region gt General settings in the project tree in the tab Preprocessor Preprocessor Solver Postprocessor Viewport BY 8 General settinas ubstances E33 Phases SI Models ME Local frames of reference Objects a Geometry 2 Sliding surfaces B Characteristics DA User variables Subregions LJ Boundary links t5 Initial grid EF H Element General settings in the project tree CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 11 Example of a common project settings CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 12 1 5 Defining Substances and their parameters Substanceis determined by the state of aggregation and properties Substancesare createdin the foldertreePreprocessor Substances Aggregative state of aSubstanceis defined in theSubstance s Propertieswindow EachSubstancehas a set of child elements corresponding to physical properties of the substance
29. ocesses Phases are defined in thePreprocessortreeinfolder Phases The project should be at least one phase Number of phases is not limited We indicate what substance is phase and define the physical processes in the phase of which will be considered in the calculation Setting phases Right click the folder Phases and select the Create continuous In yourfolder is displayed Phases new elementPhase 0 Expand the created element right click the lineand select thefolderSubstancesin itAdd remove Dialog box clickthe substance Select substances Not selected Add al gt gt gt sss REMOVE all Select the desired substance in the list on the leftunselected in our case Voda_Zhidkaya and clickAdd The selected material is displayed in the right listselected ClickOK In the folderis displayedSubstancesadded element Select the item Physical processesin the folderSubstances In thePropertieswindowdisplays a list of physical processes CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 16 Select the drop down lists the physical processes in the following order e parameter Heat transfer select from the list of value Convection amp conduction e parameterMovement Motionselect from the list the value ofNewtonian fluid e Turbulenceparameter value select from the list ofKES standard k e turbulence model Please note thatwhile themovementMotion none None turbulence mo
30. on and keep it pressed move the mouse pointer For a reference use the icon of the coordinate system showing the unit vectors of the coordinate system in its default configuration it is located in the lower left corner of theView In order to zoom in the mixer windowView a move the mouse pointer in theViewwindow b rotate the mouse wheel Image is increased or decreased relative to the center of the windowView In order to shift the image in the mixerView a move the mouse pointer in theViewwindow b click the right mouse button and keep it pressed move the mouse pointer To return to the original state of the image in theViewwindowand display the entire geometric model of the computational domain click CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 8 To display groups of facets that make up the geometric model The geometric model of the computational domain consists of several groups of facets to display borders groups click E Press to activate the selection To display one of the groups of facets a move the mouse pointer on the geometric model and click the left mouse button on the screen will be only one of the groups of facets lying beneath the point of clicks One side of the group is a front surface and painted by holding down the On the reverse side of the surface pattern applied to the group of fragments after re clicking the left mouse button
31. pertieswindow Time step The time step can be set e permanent e by the Courant Friedrichs number Lew In order to set the time step in thePropertieswindowof the time step e specify the way in which will be determined by the time step e then set the values needed to determine the time step chosen method Constant step is recommended to set equal to 1 10 of the characteristic time In the problem of flow in the pipe as a typical time span can be selected that it would take a particle released from the entrance of the computational domain in order to reach the exit of the computational domain And the problem of flow around an aircraft as a characteristic linear dimension can take the size of the device in the direction of flow and as a characteristic velocity the speed of the incoming flow at infinity The flow in the mixer X Ask apermanent step 0 001s Setting conservation The results of the calculation can be saved automatically in the process of calculating the specified interval If necessary it is possible to preserve the history of calculation You can store the data and layers Saving data is configured in the Autosave data Saving layers can be adjusted in the AutoSave layers The operations with saved results inPre Postprocessor Operation Running on the computation of a stored step Visualization in touch withColverom Visualization without regard toColverom Visualization of layers created prior to the calc
32. project 14 Create a series of graphic files Trending of the calculation time Animation CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 3 1 1 Example of a problem mixing a liquid Consider the flow of water in the mixer which is a tank with two supply tube at the base and one outlet tube on the cover Water T 70C won Tank diameter is 0 04 m the height of the cylindrical part of the tank 0 02 m height of the cover 0 01 m diameter of the tubes 0 01 m Through one of the tubes served cold water T 0 C through the other hot T 70 C the water flow in the supply tube is the same and equal to 0 1 kg 1 The purpose of the calculation is to obtain the flow pattern and temperature equalization of water in a blender CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 4 1 2 Loading a geometric model of a mixer The geometry of the computational domain on the basis of which the project is created create a software package isFlowVisionin geometric modeling systems Formation of the project begins by loading the geometric model of the computational domain Perform the following steps StartPre Postprocessor Start Button Windows gt Programs gt FlowVision gt Pre Postprocessor Window of Pre Postprocessor will open Before the launch ofpre postprocessorto be launched License Manager Start ofLicense Managercan be
33. s settings can be performed at any time When conducting long term calculations should always display the data in the calculation process as in this case the user is able to permanent control over the process of convergence of the solution and if necessary to intervene in the process of calculating when a numerical instabilities or divergence of solutions Sometimes the user makes a mistake when setting the option and the majority of these errors are detected in the first iteration of the computational algorithm by observing the behavior of the solution Notes Fia and M the to acts on the body are equal in magnitude and opposite in sign Fig and M respectively the force and the moment that the body acts on the flow Force and the moment that The moment is defined relative to the center whose coordinates are given in the Characteristics 3 When you create a Plot along curve requires that the curve was in the first quarter quadrant of the coordinate system graph CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 35 OnStreamlinesalso necessary to set thesource As a source can be anyobject CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 36 1 13 1 Creating charachteristics To control the output flow regime a steady state will monitor the temperature at the exit of the mixer To do this follow these steps First you need to select a comp
34. ss flow through the section The average surface SupergroupCreate Characteristicsin the Temperature lt f surf gt temperature d on a given surface corresponding CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 34 Force or moment SupergroupCreate Characteristicsin the Any list F lig X Y Z acting on a d on the surface of corresponding Ka 1 2 streamlined bod se Position of the Imported object Characteristicson the Any list The center of center Moving body On which a Moving correspondingimport rotation X Y Z objects Velocity of Imported object Characteristicson the Any list Velocity X Y Z movement Moving On which a Moving correspondingimport bod objects Local values Plot of the pressure Plane section Plot along curve Pressure distribution along the corresponding to Plane contour of the cross 3 section The pressure Plane section Color contours Pressure distribution in the corresponding to Plane 2 cross section The velocity Plane section Vectors corresponding Velocity distribution in the cross section The pressure SupergroupCreate Color contours Pressure on the ae it surface of pons to pace 4 Surface phase only Computational in problems with the Pressure in a given j Characteristics to volume sensor Box or Ellipsoid facilities sphere or Cone cylinder corresponding sensor Create a layer and change it
35. try gt Region Surface 0 gt Region Group 8 and in thePropertieswindow selectLog hotboundary conditionfor the parameter and then click Apply In the folderSubregions gt subregion 0 gt Boundary conditions highlight theLog cold in thePropertieswindow find the sectional area of the supply tube 7 7777591212273E 05 m2 In the folderSubregions gt subregion 0 gt Boundary conditions gt Login cold a scroll to theVelocity in thePropertieswindow set the valuefor the parameter1285 7mass velocity and then click Apply 1285 7 value obtained by dividing the flow rate of 0 1 kg s by the area of the supply tube 7 7777591212273E 05 m2 scroll to thetemperature In thePropertieswindow specify a value of O for the parametervalue and then click Apply In the folderSubregions gt subregion 0 gt Boundary conditions gt Sign hot scroll to Velocity in thePropertieswindow set the valuefor the parameter1285 7ma velocity and then click Apply scroll to the temperature in the Properties window set the value of 70 for the parameter value and then click Apply CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 22 For in this example mixer Ask four boundary conditions Wall Entrance for hot water cold water entrance and Gate e DefineModel 0inSubRegion 0 e Boundary conditionsin the folderthrough the context menu create three boundary conditions one already created by default e Arr
36. ulated distribution of the values computed characteristics and perform other auxiliary operations CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 6 CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 7 1 3 Operations in the View window Before you generate the project consider loaded geometric model of the computational domain Additional objectplane Oin the folder 3D scene gt Objects gt Computational spaceallows to cut part of the geometric model Operations in theViewwindow performed using the toolbar buttons and mouse Image of a geometric model of the computational domain To adjust the image Click the buttonElito turn off the effect of perspective and be sure to click Tlenough to fill the surface geometric model 2 Click to display facets making up the framework of the model surface Press this button Click for mode conversion type To rotate an image Click the button F kto display the internal and external surfaces of the object Click IX EX IY BY 12 IZ get the views of the mixer along the axes of the coordinate system associated with the model ofthe computational domain absolute coordinate system The contour of the cross section of the mixer object plane 0 is displayed in blue In order to rotate the image of the mixer in theView a move the mouse pointer in theViewwindow b click the left mouse butt
37. ulation of Beds of the parameters did not change after saving Changed settings affecting the constructionCloya Changed settings affecting the displayCloya Visualization of layers created after calculating Automatic sequential loading results in touch withColverom The operations with saved resultsinViewer Operation Visualization in touch withColverom CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 31 Visualization without regard toColverom O wo ye Visualization of layers created after calculating ves No Automatic sequential loading results without regard to the solver Wo Yes The flow in the mixer Ask Data autosavewth parameters Frequency type By the time S the number of seconds 0 005 Notes Visualization is performed using the build settings defined before saving Specifying Conditions stop The calculation can be stopped manually by the user through buttons in the toolbar or automatically in accordance with the terms of the stop Break conditions 1 The length of time Payment stops at the specified time 2 Iteration Payment stops when the specified number of iterations 3 Residuals Payment stops when all the created residuals calculated variables are below the specified values 4 Custom values Payment stops when all the residuals by custom variables are below the specified level Plot residuals calculated variables and va
38. unnnnnunnnunununenunenenenenenenenenennnnnnnnnnnnnn 42 1 15 Monitoring the project calculation proCeSS assssssuuensneurunnnnurnnennnnunnnnnnnnennnnnnnnnnnnnen ennan 43 1 16 Creating an animatiON ssccccssssccscsesscsssessscessesscnensessesenseseeesnarseeaceatsneaseatenensensenenseseeesnes 46 CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 2 1 Quick start This section shows a case study of a full cycle of the project from the formation of the project to analyze the results After stepping through the actions described here you will gain basic skills of working with the interface FlowVision As an example consider task fluid mixing in a mixer Sequence of actions I O O1 amp N Download the geometry Discover basic operations in the View Specify the general settings of the project Ask Substances In this example one substance Water Ask Phase Liquid water and its parameters Ask Model and its parameters Specify Model in computational subregion Ask Boundary conditions tap Explore the concept Initial conditions 10 Ask a computational grid ie set Starting grid and configure Adaptation 11 Set the control parameters calculation 1 Adjust the display of the results a establishment characteristics b creation of layers 12 Practice with the procedures start stop and continue the calculation 13 Adjust the control to calculate
39. ur tabs Preprocessor Solver Postprocessor Viewport After creating the project and download the geometrical model of the computational domain all folders of the project tree empty folders except the geometric model of the computational domain and its display parameters e Preprocessortabgeometric model of the computational domain is displayed in the folderRegion gt Subregions gt subregion 0 gt Geometry automatically generated when loading the boundary conditions are located atRegion gt Subregions gt subregion 0 gt Boundary conditions e Postprocessortabdisplay options boundary conditions are placed in folders3D scene gt Objects gt Computational space gt Solids gt Subregions gt SubRegion 0 gt Boundary conditions and 3D scene gt Layers gt Solids gt Subregions gt SubRegion 0 gt Boundary conditions In addition to the geometric model of the computational domain in the project tabPostprocessorautomatically creates aplane Oin the folder3D scene gt Objects gt Computational space The plane is displayed in theView 4 the vertical line of blue color Plane Ois oriented perpendicular to the X axis and passes through the center of the computational domain This plane is not part of the geometric model of the computational domain so it remains invisible to the current in the mixer of the liquid ie it completely transparent to the liquid and has no influence on it The plane is necessary in order to display it on the calc
40. utation Characteristics A set of integral values including secondary obtained after integration of a variable on the surface or in the bulk of the object Job characteristics is reduced to the direction of the variable and the object on the surface or volume which should be integration To do this select the output section to set up an a Supergroup element of the project tree containing facets which supplied the output boundary condition We use the fact that the component characteristics included in the calculation of the number of stopping criteria is displayed in the form of a graph in the Monitor and define stopping condition calculation the criterion on the basis of characteristics of components to the average value of the variable Open the tabcontext menu itemPreprocessorSubregions gt subregion 0 gt Boundary conditions gt Exit and then click Create supergroup gt preprocessor In the project tree is added created supergroup in our example an element Supergroup on Outlet in the folderObjects E Ap Objects CE Computational space Me Supergroup on Outlet Open the context menu on the element Supergroup on Outlet and select Create characteristics A dialog box Create new characteristics block Create new characteristics block x ClickOK CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 37 In the project tree element is added Characteristics 0 Supergroup on
41. x select the appropriate project If you can not download the file geometry then e checkwhether he FlowVision supported format and its elements are the requirements e send thefileto thegeometry technical support FlowVision with a description of the problems encountered CAPVIDIA 1999 2015 Leuven Belgium All rights reserved FlowVision Help Quick start 5 In the review 4 pre postprocessorappears loaded geometric model of the computational domain lol x B 4 Models 1 Model 0 DE Local frames of reference 5 Ap Objects CT Computational space Complex surface 0 Sliding surfaces UIT SubRegion 0 ic UF Boundary conditions B Cond 0 Zf B Cond 1 a Geometry Region Surface 0 Modifiers D Adaptation Hs Adaptation to solution 5G Initial conditions H J Boundary links 1 Initial grid Information PrePostProcessor started on 31 03 14 at 19 01 44 Information New project has been successfully created in C Documents and Settings kras Idocuments F ClientProjects WaterMixer Information New status has been loaded time 0 step 0 Window pre postprocessor In the illustration the numbers are the components of the windowspre postprocessor e the main menu 1 toolbars 2 Projectwindow 3 WindowView 4 Propertieswindow 5 Protocolwindow 6 Monitoringwindow 7 status bar 8 In the project window 3 the project tree is displayed in fo
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