物理问题很简单:长方体区域,四个面是固壁边界条件。进口是速度边界条件,出口是压强边界条件。
在计算过程中就会出现
Solution has exceeded specified divergence limits. This probably
indicates a divergent solution. If required, the limits may be
changed using the ncnv,,dlim command.
导致迭代停止,怎么处理这个问题
谢谢
命令流如下
/FILNAME,boxfluid,1
/prep7
ET,1,142
BLC4,0,0,40,20,5
ASEL,S,AREA,,ALL,
ESIZE,1
vsel,all
VATT,1,1,1
mshkey,1
MSHAPE,0,3d
VMESH,ALL
alls
asel,s,area,,1,2,
da,all,vx,0
da,all,vy,0
da,all,vz,0
asel,s,area,,3,4,
da,all,vx,0
da,all,vy,0
da,all,vz,0
asel,s,area,,5
da,all,vx,1
da,all,vy,0
da,all,vz,0
asel,s,area,,6
da,all,pres,0
allsel
/solu
FLDA,SOLU,FLOW,TRUE
FLDA,SOLU,TURB,1
FLDA,ITER,EXEC,300
FLDA,OUTP,SUMF,10
FLDATA26,STAB,TURB,0.2
FLDATA25,RELX,PRES,0.3
fldata25,relx,vx,0.3
FLDATA31,capp,velo,t
FLDATA31,capp,pres,t
!!CFD PROPERTY INFORMATION
FLDA,PROT,DENS,CONSTANT
FLDA,PROT,VISC,CONSTANT
FLDA,NOMI,DENS,10
FLDA,NOMI,VISC,1
FLDA,CONV,PRES,0.1E-6
FLDA,MIR,MOME,0.5
FLDA,MIR,TURB,0.3
solve |