[求助]这个问题怎么办呀？大伙来看看！

hitmainpro

马赫数为5
大气环境为：压力1.0524627pa   密度：1.84583*10-5  kg/m3
            粘度：1.3208*10-5 kg/(s.m)     温度：198.639k
我设定条件后就是不能运算，我设得条件为：coupled implicit,2d,S-A viscous model,Energy equation,desity用ideal-gas,Cp用constant 1006.43, Thermal conductivity 用constant 0.0242, viscosity 用sutherland, operating pressure用0pa,
pressure_far_feild 边界条件！
每次运算都不能进行！！！出现如下错误：
  iter continuity x-velocity y-velocity     energy        nut     time/iter
divergence detected - temporarily reducing Courant number to 0.5
and trying again...
divergence detected - temporarily reducing Courant number to 0.05
and trying again...
divergence detected - temporarily reducing Courant number to 0.005
and trying again...
divergence detected - temporarily reducing Courant number to 0.0005
and trying again...
divergence detected - temporarily reducing Courant number to 5e-05
and trying again...
Error: Internal error at line 806 in file 'rp_mstage.c'.
divergence detected in AMG solver
Error Object: ()
谢谢指点！

xlyang

已经很明显了，让你降低Courant数啊。

hitmainpro

我降低courant数到0.005还是不行呀！

xlyang

降到0。0000000005试试。