急：流固耦合 温度不收敛
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做考虑辐射的流固耦合出现以下错误：
error：cofficient matrix has a negative diagonal 。probably indicates divergent solution。
清高人指点一下错误的原因!
error：cofficient matrix has a negative diagonal 。probably indicates divergent solution。
清高人指点一下错误的原因!
买CAE软件找CAENET
命令流如下：FLDATA1,SOLU,TRAN,0
FLDATA1,SOLU,FLOW,1
FLDATA1,SOLU,TEMP,1
FLDATA1,SOLU,TURB,1
FLDATA1,SOLU,COMP,0
FLDATA1,SOLU,VOF,0
FLDATA1,SOLU,SFTS,0
FLDATA1,SOLU,IVSH,0
FLDATA1,SOLU,SWRL,0
FLDATA1,SOLU,SPEC,0
FLDATA1,SOLU,ALE,0
FLDATA1,SOLU,RDSF,1
/COM,,Steady State Analysis,0
FLDATA2,ITER,EXEC,300,
FLDATA2,ITER,OVER,30,
FLDATA2,ITER,APPE,30,
FLDATA3,TERM,VX,0.01,
FLDATA3,TERM,VY,0.01,
FLDATA3,TERM,VZ,0.01,
FLDATA3,TERM,PRES,1e-008,
FLDATA3,TERM,TEMP,1e-008,
FLDATA3,TERM,ENKE,0.01,
FLDATA3,TERM,ENDS,0.01,
FLDATA5,OUTP,SUMF,10,
FLDATA18,METH,PRES,1
FLDATA19,TDMA,PRES,100,
!FLDATA18,METH,temp,1
!FLDATA19,TDMA,temp,100,
FLDATA18,METH,TEMP,2
FLDATA22,MAXI,TEMP,1000,
FLDATA20,SRCH,TEMP,2,
FLDATA21,CONV,TEMP,1e-012,
FLDATA23,DELT,TEMP,1e-010,
我用mfs进行耦合的，请高人指点指点！我都调试了很多次啦！
高手帮帮忙吧！
先谢谢啦