Lecture 2 - The Wizard――FloEFD的培训教程(三天)李中云

.Lecture2TheWizard24.WizardandNavigator•TheWizardallowsyoutocreateanewprojectinastep-by-stepprocess.•Navigatorallowsyoudirectaccesstodialogboxesfoundinthewizard.25.Step1:ProjectConfiguration26.Step2:UnitSystem27.Step3:AnalysisType28.AnalysisType•Internalflowanalysisareforflowsboundedbyoutersolidsurfaces.–e.g.,flowsinsideenclosures,HVACsystems,etc..•Externalflowanalysisareforunboundedflows.Inthiscasethesolidmodelisfullysurroundedbytheflow.–e.g.,flowsaroundenclosures,automobiles,buildings,etc.•Ifyouwanttoanalyzebothinternalandexternalflowssimultaneously,useExternalanalysis.–e.g.flowsoverandthroughanenclosure29.Formodelsthathaveinternalspacesnotinvolvedintheflowanalysis,youcanusetwoadditionaloptionsforreducingthesimulationtime:•Excludeinternalspaces.AllowsustodisregardclosedinternalspacesinExternalflowanalysis.•Excludecavitieswithoutflowconditions.InbothInternalandExternalflowanalysesselectthisoptiontodisregardclosedinternalspaceswithnoBoundaryConditionsorFansspecifiedontheirsurfaces.InternalcavityCavitywithoutflowconditionConsiderclosedcavities30.•Heatconductioninsolids•RadiationPhysicalFeatures31.•Time-dependent–Specifythephysicalanalysistime–Specifytheoutputtimestepofresults•Gravity32.•Rotation33.Step4A:DefaultFluid34.Step4B:DefaultSolid35.Defaultouterwallthermalconditions:•Adiabaticwall•Heattransfercoefficient•Heatflux•WalltemperatureStep5:DefaultWallConditions36.Step6:InitialAmbientConditions37.•UnderParameterDefinitionselectwhetheryouwanttomanuallyspecifyinitial(ambient)conditionsorapplyanotherproject’sresultsasinitial(ambient)conditionsforthecurrentproject:–SelectUserDefinedformanualspecification.–SelectTransferredforusingresultsfromanothercalculation.38.Step7:ResultsandGeometryResolution39.•ResultResolutiongoverns:–thesolutionaccuracythroughmeshsettings.–ahigherlevelproducesmorefinecellsbutitwilltakegreaterCPUtimeandmorecomputermemory.–Forthemajorityoftasksyoucanachievestableresultsstartingfromlevel3.–MoreadvancedBasicMeshsettingsavailablefromtheInitialMeshdialogbox.40.•TheGeometryResolutionoptions,whichalsoinfluencetheinitialmesh,canbechangedintheInitialMeshbox,and/ortheireffectscanbecorrectedintheInitialMeshandLocalInitialMeshdialogboxes.•Minimumgapsize–Smallestdetailtoberesolvedbythemesh•MinimumwallthicknessGapSizeWallThickness41