flow3d prepin.inp常用参数详解

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1、1$xputTWFIN . Time to end calculation. Default is TWFIN=10.0 unless thermal cycling is activated (see Thermal Cycling Options).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 . Indicator for free surfaces or sharp interfaces=0, no free surface or sharp interface=1, free surface or sharp interfaceDefault

2、s to 0 if IDRG 5; defaults to 1 if IDRG=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GY 0.0 Gravity component in y direction. See GRAVY in namelist MOTN for orientation varying gravity. Note: For cylindrical coordinates, use GRAVX, GRAVY.考虑重力对压铸影响,注意 g 的方向且为-980,单位为 CGS。GRAVX 0.0 Initial x-directi

3、on component of gravity.坐标系为极坐标时用上述参数IFENRG . Flag for internal energy evaluation=0, no energy solution=2, solve transport equation for internal energy (1st order advection)=3, solve energy transport equation using monotonicity preserving, second order method.Defaults to 0 if ICMPRS=0 and IHTC=0;def

4、aults to 2 if ICMPRS=1 or IHTC0.选择能量方程用于计算2ISHRNK 0 Solidification shrinkage flag. Shrinkage models may only be used for one-material problems (NMAT=1) when ITB=1. Solidification must be activated and solidified density (RHOFS) must be different than liquid fluid #1 density (RHOF). Shrinkage cavitat

5、ion pressure (PCAV) must also be set for Dynamic Shrinkage model. (PCAV, RHOFS and RHOF are in namelist PROPS.)=0, no shrinkage model=1, activate Dynamic Shrinkage model=2, activate Rapid Shrinkage model.凝固收缩的定义:0 表示不收缩。IFVIS 0 Viscosity evaluation flag=0, local viscosity evaluation (no turbulence m

6、odel)=1, Prandtl mixing length=2, turbulent energy model=3, two-equation (k- ) turbulence model=4, Renormalized Group Theory model (RNG)IFIN 1 Selects the basis for termination of the calculation=1, terminate when tTWFIN=2, terminate when fill fraction exceeds FRCFIN or no cells are empty or TTWFIN=

7、3 terminate when solidified fraction exceeds FRCFIN or TTWFIN.确定终止计算过程,2 为以充填百分比为计算终止标准。FRCFIN 1.0 Fill fraction (IFIN=2) or solid fraction (IFIN=3) for termination of the calculation充填完成百分比,一般为 1001DTMAX 1.e10 Maximum permitted time-step size.DTMIN 0.0001?/FONTDELT Minimum permitted time-step size.

8、分析时间间距最大及最小EPSADJ 1.0 Multiplier for the calculated pressure iteration convergence criterion(alt: EPSI). When EPSADJ 0, the convergence criterion, EPSI, is set automatically at each time step.=0, use constant EPSI set by user=1, standard convergence criterion 标准的收敛标准熔汤层流状态31, coarser convergence粗糙的收

9、敛MU1?/FONTCV1Thermal conductivity of fluid #1. (RMK is in namelist XPUT.)流体的热传导率THCS1 THC1 Thermal conductivity of solidified fluid #1.凝固后流体的热传导率。TSTAR . Reference temperature for temperature dependent fluid properties.If TS10, TSTAR=TL1; otherwise, TSTAR defaults to 373.15.流体最初的参考温度。CSTAR 0.0 Refer

10、ence solute concentration for concentration-dependent density. CSTAR also corresponds to TS1 and TL1 on the phase diagram.参考溶质的浓度由密度决定CLHT1 0.0 Latent heat of fusion in fluid #1(alt: CLHT).熔汤 1 熔化潜热。TS1 0.0 Solidus temperature of fluid #1固相线(液体凝固的临界温度)TL1 0.0 Liquidus temperature of fluid #1. (Used

11、only when TS10.)液相线(固体熔化温度)DRATIO 0.0 Ratio of solute diffusion coefficients in solid and liquid phases.在固/液相,溶质扩散系数的比率。TNIYAM TS1 Temperature at which solidification variables are calculated (i.e., solidification time, temperature gradient, etc.).要计算凝固变数的温度。 (例如凝固时间,温度梯度等)TSDRG 1.0 Coefficient of s

12、olidification drag.缓慢凝固的系数。FSCR 1.0 Critical solid fraction above which metal has no fluidity.在金属没有流动性上面临界的固态分数FSCO 0.0 Fraction of solid at coherency point. When the value of the solid fraction is below FSCO, then the solidified material is assumed to increase the apparent viscosity. When solid fra

13、ction is above FSCO, the solidified material forms a 5coherent structure which is accounted for by using a drag force.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MU1 MUI Dynamic viscosity of fluid #1. 流体 1 的动态黏度。MUC00 0.0 Coefficient in strain rate-dependent viscosity model.相依存的张力比率粘度模型 1 的系数。MUC0 1.0 Coeffi

14、cient in strain rate-dependent viscosity model.MUC1 0.0 Coefficient in strain rate-dependent viscosity model. (MUC10.0 activates model.) Note: See the Theory Manual (Section 3) for the use of these variables and the shear dependent viscosity equation.MUC2 0.0 Coefficient in strain rate-dependent vis

15、cosity model.MUC3 0.0 Coefficient in strain rate-dependent viscosity model.MUTMP1 0.0 Coefficient in temperature dependent viscosity model. MUTMP10.0 activates model. Note: See the Theory Manual (Section 3) for the use of these variables and the temperature dependent viscosity equation.MUTMP2 0.0 Co

16、efficient in temperature dependent viscosity model.MUTMP3 1.0 Coefficient in temperature dependent viscosity model.上述参数当选择了流体后自动产生, (如铝合金、镁铝合金等)CANGLE -90?/FONTStatic contact angle (in degrees) for fluid #1 wall adhesion. 0 (TMELT-TEUT) / (TMELT-TL1); otherwise, defaults to 0.0.共晶的浓度。6TEUT . Eutectic temperature (alt: CEUT). If CEUT is set, then TEUT defaults toTEUT=TMELT-(TMELT-TL1)?/FONTCEUT/CSTAR; otherwise, defaults to 0.0.共晶温度。CEXF1 0.0 Solut

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