Fluent模擬的基本步驟

1、xCase.ReadkData.WritekCase-&Data.ImportPDF.,Export.DTRMRays.ViewFartors.Interpolate1.EProfile.Hardcopy.SATTable.EatchOptions.1g匚heme.SaveLayoutJournal.Run.1fRSF.ExitWelconetoFscriptFileCopyright20AllRightsRC:FluenFluent模擬的基本步驟1.運(yùn)行Fluent出現(xiàn)選擇Fluentversion選擇界面FLUENTVersion一般二維問(wèn)題就選擇默認(rèn)的2d,即單精度二維版本就可以了，但是

2、本問(wèn)題求解區(qū)域是一個(gè)扁長(zhǎng)形狀的，建議選擇2ddp，即二維雙精度版本，計(jì)算效果更好。打開(kāi)網(wǎng)格文件FileGridDefine從菜單fileReadCase選擇fin目錄下的fin.msh文件SelectFilea指定計(jì)算區(qū)域的實(shí)際尺寸在Gambit建立區(qū)域時(shí)沒(méi)有尺寸的單位，此時(shí)應(yīng)該進(jìn)行確定，也可以對(duì)區(qū)域進(jìn)行放大或縮小等。FileGridDefineSolveCheckInfoMerge.SeparateFuse.ZoneSurfaceMesh.ReorderScale.Translate.Rotate.Smooth/Gwap.ScaleFactorsChangeLengthUnitsScaleG

3、riidnitConversionGridWasCreatedInDomainExtentsScaleUnscaleCloseHelp在菜單Grid下選擇Scale出現(xiàn)上面的對(duì)話框。將其中的Gridwascreatedby中的單位m,更改為mm,此時(shí)scalefactorX和Y都出現(xiàn)0.001。然后按Scale選擇模型該問(wèn)題是穩(wěn)態(tài)問(wèn)題，在Solver中已經(jīng)是默認(rèn)，只是求解溫度場(chǎng)。由菜單DefinefModelsEnergy然后選擇EnergyEquation。孚FLUENT2-d,dpsefiregatedjlamFileGridSolveAdaptSurfaceDisplayFlotRepo

4、rtParallel旦e4Qn4Qn122Un64QcModelsMaterials.Phases.OperatingConditionsSolver.Multiphase.Eri&rgy.Building-.grid,materinterdomaiEoundaryConditions.PeriodicConditions.GridInterfaces.DynamrcIteshzoneENixing：PlanesViscousRadiation.DiscretePhase.Solidification&.MeltingAcousticsEnergyEnergy臣EnergyEquation指定

5、邊界條件和求解區(qū)域的材料需要將求解區(qū)域的四個(gè)邊界進(jìn)行說(shuō)明，由菜單單DefineModelsBoundaryconditions。首先設(shè)置左邊界，即肋根的條件。點(diǎn)擊left項(xiàng)，Type列表中缺省指定在Wall，所以不需要改變，再點(diǎn)擊SetBoundaryConditionsdefault-interioiinlet-ventdov/nintake-fan壯ftinterfacerightmass-flow-inletupoutflowzoneoutlet-ventpressure-far-fieldpressure-inletpressure-outletsymmetryvelocity-inl

6、etwallZoneType=IDSet.Copy.CloseHelp|選擇thermalconditions列表中的Temperature,并且在右側(cè)Temperature（k）中填入323（即50C）,然后點(diǎn)擊OK完成。按照同樣方法對(duì)up、down和right三個(gè)邊界進(jìn)行設(shè)置。這三個(gè)邊界均為對(duì)流邊界，需要給出表面?zhèn)鳠嵯禂?shù)和流體溫度。本問(wèn)題的求解區(qū)域?yàn)楣腆w，并且設(shè)定其物性參數(shù)。在zone列表中選擇zone（在Gambit中指定的名字），已經(jīng)是默認(rèn)的solid.點(diǎn)擊setSolidZoneNamezanMaterialNamealuminumSourceTermsFixedValue?Rota

7、tion-AxisOriginCanc&idHelp點(diǎn)擊Edit編輯材料的物性，本問(wèn)題只是設(shè)計(jì)材料的導(dǎo)熱系數(shù)，所以僅需將導(dǎo)熱系數(shù)的值更改為160，然后點(diǎn)擊Change后再close，上一個(gè)頁(yè)面后按ok。此時(shí)可關(guān)閉Boundaryconditions。初始化最初的溫度場(chǎng)由菜單solveflnitializeInitialize|AdaptSurTsceDisplayPlQtReportParCufftUdisIxiitialize卜InitializeJIofLitorsEatchAnimateResetDFMSourcesMeshMotion.ResetStatisticsE遑rticleHi

8、story卜fl_s1119UllrEkscuteConnuanis.IterateicousticSignals.?ttingsXXAdminisl:ratoi對(duì)話框中的Temperature默認(rèn)值是300K。所以直接點(diǎn)擊Init,出現(xiàn)warning對(duì)話框，點(diǎn)擊Ok,再Close.進(jìn)行迭代求解由菜單solveIterate進(jìn)入迭代選項(xiàng)對(duì)話框，將NumberofIteration改為100次，一般簡(jiǎn)單導(dǎo)熱問(wèn)題的迭代幾十次就夠了，若達(dá)到收斂條件，就會(huì)自動(dòng)終止迭代。SolveAdaptSurfaceControlsInitializeNoriitorsAniinateMeshMotion.Part

9、ideHrstoryEkecuteComnands.IterationNumberofIteriionsReportingIntervalUDFProfileUpdate：Interval10011Jh.*Jk.VJlAcousticSig：n.alEIterateApply|!Ci產(chǎn)寸Hulp|然后按Ierate開(kāi)始迭代計(jì)算。畫出模擬結(jié)果的溫度等值線圖由菜單DisplayContours進(jìn)入對(duì)話框。在contoursof列表中選擇temperature.Options中可勾選Filled,Levels默認(rèn)是20,可根據(jù)情況改為40,表示的是多少條等溫線。然后按Display.本問(wèn)題縱坐標(biāo)顯示

10、溫度均為323K，原因是表面溫度差異很?。◤?23.6K到323K).ContoursXOptionsCorrtoursof9Filled|Temperature.兩NodeValues審GlobalRangeStaticTemperaturezl7AutoRangeMinMax廠CliptoRangeh|oDrawProfilesIIDrawGridSurfaces=J=default-interiorLevelsSelupdownleftrightSurfaceNamePatternupISurfaceTypes=Iaxisk|Matchclip-surfexhaust-fanfanDis

11、playComputeCloseHelpFLUENTLOJFluentInc3.33c*023.23t+023.23c*023.33t*023.33c*023.23c*023.23c*023.33c+023.33c*023.23c*023.23c*023.33c+023.23t+023.23c*023.33t*023.33c+023.23t+023.23c*023.33t*023.33c*023.23t+02Corrtour;oEStrticTtmptrrturtkApr30.2015ELUETfT2d,dp,hm)若想將此圖保存。由菜單FileHardcopy,出現(xiàn)下面的對(duì)話框。將Forma

12、t改為JPEG，Coloring中改為Color，然后Save.raphicsHardcopyFormatEPSHPGLIRISImageJPEGPICTPPMPostScriptTIFFVRMLWindowDumpColoringiCoioHGrayScaleMonochromeOptionsFileTypeRasterVectorResolution臣LandscapeOrientationI?ReverseForeground/BackgroundWindowDumpCommand|import-windowWidthHeightmmSave.Apply|Preview|CloseHel

13、p|Options中不勾選Filled出現(xiàn)的圖為3.23e+02323&+023.3e+0?3.23e+023.23e+02$23e+02!3.23e+023.23e+023.23e+023.?3e+023.23e+023.2CSe+O3.?3&+0?3.2r3e+0?3.3e+023.23e+023.?3&+0?3.23&+023.23&+023.23e+02Ccntouro捕StaticTemperflhjro(l)AprSO,216FLUENT6.2(2d,dp；aegregatad,lain|i畫出指定面的溫度分布比如畫出上邊界(UP)上的溫度分布，由菜單Plot選擇XY-Plot將Y

14、-AxisFunction選擇為Temperature,Surfaces選擇up，然后按PlotjriS.23e-Fti23.23e+a2StaticTsmperatLjm愛(ài)丙“的.2+D23.空3#-+02i111i1111i111i111i1111i1111ia111i1111i1111i00.00250.0060.00750.010.01250.0150.01750.020.0225Position(rn)S-tsiticTflmpflrjti-rflApr3J2dlSFLUENT6.2r2d?dp;segregated：,leunl1里用同樣方法畫right面（即肋端）的溫度分布。將P

15、lotDirectionF面的X值改為0,Y值改為1,Surfaces中僅選擇right,然后plotI*ht5.23e+ti23怎対他3.2aB+023.25*402StaticTemperature(k)3.23t4023.2Sb-h023.23e4023.2Sb-hD23.23c-+02i111i1a1i111i111i11i111111i11111i00.0010.0020.M30.0040.W50.0060_M7O.iWS0.009Position(m)StaticTqepa出iwApr3!)201&FLUENT6.2(2d,dp；segregated,laml1計(jì)算肋片的總散熱量由菜單ReportsFlux.在Options中選擇Totalheattransferrate熱流量在Boundaries中將4個(gè)邊界全選，點(diǎn)擊Compute得到結(jié)果FlusReportsOptions-RadiationHeatTransferRateBounda