flow3dprepininp常用参数详解

1$xputTWFIN...Timetoendcalculation.DefaultisTWFIN=10.0unlessthermalcyclingisactivated(seeThermalCyclingOptions).计算结束时间，在热循环开启的情况下默认值为10.0（参考热循环选项）计算完成时间ITB...Indicatorforfreesurfacesorsharpinterfaces=0,nofreesurfaceorsharpinterface=1,freesurfaceorsharpinterfaceDefaultsto0ifIDRG5;defaultsto1ifIDRG=5.自由表面或粗糙界面的指示器＝0表示二者都没有＝1表示二者有其一是否考虑熔汤表面与空气的影响GY0.0Gravitycomponentinydirection.SeeGRAVYinnamelistMOTNfororientationvaryinggravity.Note:Forcylindricalcoordinates,useGRAVX,GRAVY.考虑重力对压铸影响，注意g的方向且为-980,单位为CGS。GRAVX0.0Initialx-directioncomponentofgravity.坐标系为极坐标时用上述参数IFENRG...Flagforinternalenergyevaluation=0,noenergysolution=2,solvetransportequationforinternalenergy(1storderadvection)=3,solveenergytransportequationusingmonotonicitypreserving,secondordermethod.Defaultsto0ifICMPRS=0andIHTC=0;defaultsto2ifICMPRS=1orIHTC0.选择能量方程用于计算2ISHRNK0Solidificationshrinkageflag.Shrinkagemodelsmayonlybeusedforone-materialproblems(NMAT=1)whenITB=1.Solidificationmustbeactivatedandsolidifieddensity(RHOFS)mustbedifferentthanliquidfluid#1density(RHOF).Shrinkagecavitationpressure(PCAV)mustalsobesetforDynamicShrinkagemodel.(PCAV,RHOFSandRHOFareinnamelistPROPS.)=0,noshrinkagemodel=1,activateDynamicShrinkagemodel=2,activateRapidShrinkagemodel.凝固收缩的定义：0表示不收缩。IFVIS0Viscosityevaluationflag=0,localviscosityevaluation(noturbulencemodel)=1,Prandtlmixinglength=2,turbulentenergymodel=3,two-equation(k-)turbulencemodel=4,RenormalizedGroupTheorymodel(RNG)IFIN1Selectsthebasisforterminationofthecalculation=1,terminatewhentTWFIN=2,terminatewhenfillfractionexceedsFRCFINornocellsareemptyorTTWFIN=3terminatewhensolidifiedfractionexceedsFRCFINorTTWFIN.确定终止计算过程，2为以充填百分比为计算终止标准。FRCFIN1.0Fillfraction(IFIN=2)orsolidfraction(IFIN=3)forterminationofthecalculation充填完成百分比，一般为100％＝1DTMAX1.e10Maximumpermittedtime-stepsize.DTMIN0.0001?/FONTDELTMinimumpermittedtime-stepsize.分析时间间距最大及最小EPSADJ1.0Multiplierforthecalculatedpressureiterationconvergencecriterion(alt:EPSI).WhenEPSADJ0,theconvergencecriterion,EPSI,issetautomaticallyateachtimestep.=0,useconstantEPSIsetbyuser=1,standardconvergencecriterion标准的收敛标准1,coarserconvergence粗糙的收敛1,finerconvergence.更好的收敛计算反复收敛标准压力的乘法器IEDT1Selectsthebasisforlongprintandspatialplot熔汤层流状态3interv-ls=1,usetime,PRTDT,PLTDT=2,usefillfraction,PRTFRC,PLTFRC=3,usesolidifiedfraction,PRTFRC,PLTFRC.选择以时间或填充百分比或凝固百分比为分析结果输出基准。PLTFRC0.1Intervalforspatialplotsbasedonfillfraction(IEDT=2)orsolidfraction(IEDT=3).空间间隔结果输出以填充百分比或凝固百分比。IHTC0Fluid/obstacleheattransferflag=0,noheattransfer=1,evaluateheattransfer=2,evaluateheattransferandsolvetheobstacleconductionequation.金属液与模具之间的传热选择。$propsRHOF1.0Densityoffluid#1.熔汤密度RHOFSRHOFDensityofsolidifiedfluid#1.熔汤凝固后的密度GAMMA-1.0Exponentinvoidregionequationofstate,(PV)^=constant.Negativevalueindicatesconstantpressure.气泡常数：负值表示恒定压力。（表示在无效区域的状态方程）CV14.187e7Specificheatoffluid#1.CV2...Specificheatoffluid#2.Defaultsto7.178e6流体的比热。CVS1CV1Specificheatofsolidifiedfluid#1.IfCLHTandCLTParraysarespecified,CVS1isnotused.凝固后流体的比热。POFL10.0Uniformpowersourceperunitmassforfluid#1.Note:POFL1isignoredforIHONLY=2(namelistXPUT).POFL20.0Uniformpowersourceperunitmassforfluid#2.Note:POFL2isignoredforIHONLY=2(namelistXPUT).给流体加热的功率是均一的。THC1RMK?/FONTMU1?/FONTCV1Thermalconductivityoffluid#1.(RMKis4innamelistXPUT.)流体的热传导率THCS1THC1Thermalconductivityofsolidifiedfluid#1.凝固后流体的热传导率。TSTAR...Referencetemperaturefortemperaturedependentfluidproperties.IfTS10,TSTAR=TL1;otherwise,TSTARdefaultsto373.15.流体最初的参考温度。CSTAR0.0Referencesoluteconcentrationforconcentration-dependentdensity.CSTARalsocorrespondstoTS1andTL1onthephasediagram.参考溶质的浓度由密度决定CLHT10.0Latentheatoffusioninfluid#1(alt:CLHT).熔汤1熔化潜热。TS10.0Solidustemperatureoffluid#1固相线（液体凝固的临界温度）TL10.0Liquidustemperatureoffluid#1.(UsedonlywhenTS10.)液相线（固体熔化温度）DRATIO0.0Ratioofsolutediffusioncoefficientsinsolidandliquidphases.在固/液相，溶质扩散系数的比率。TNIYAMTS1Temperatureatwhichsolidificationvariablesarecalculated(i.e.,solidificationtime,temperaturegradient,etc.).要计算凝固变数的温度。（例如凝固时间，温度梯度等）TSDRG1.0Coefficientofsolidificationdrag.缓慢凝固的系数。FSCR1.0Criticalsolidfractionabovewhichmetalhasnofluidity.在金属没有流动性上面临界的固态分数FSCO0.0Fractionofsolidatcoherencypoint.WhenthevalueofthesolidfractionisbelowFSCO,thenthesolidifiedmaterialisassumedtoincreasetheapparentviscosity.WhensolidfractionisaboveFSCO,thesolidifiedmaterialformsacoherentstructurewhichisaccountedforbyusingadragforce.在临界点的固态百分数。当固态百分数小于临界值时，凝固的物质粘度明显增加MU1MUIDynamicviscosityoffluid#1.流体1的动态黏度。5MUC000.0Coefficientinstrainrate-dependentviscositymodel.相依存的张力比率粘度模型1的系数。MUC01.0Coefficientinstrainrate-dependentviscositymodel.MUC10.0Coefficientinstrainrate-dependentviscositymodel.(MUC10.0activatesmodel.)Note:SeetheTheoryManual(Section3)fortheuseofthesevariablesandthesheardependentviscosityequation.MUC20.0Coefficientinstrainrate-dependentviscositymodel.MUC30.0Coefficientinstrainrate-dependentviscositymodel.MUTMP10.0Coefficientintemperaturedependentviscositymodel.MUTMP10.0activatesmodel.Note:SeetheTheoryManual(Section3)fortheuseofthesevariablesandthetemperaturedependentviscosityeq