求助燃烧室燃烧问题

木风198705

燃烧室燃烧模拟，迭代结果不收敛，问题可能处在什么地方？如何改正？此外做导弹飞行阻力模拟试验，平面问题，问题如下：  7 1.4302e+03 2.7019e+05 8.2050e+05 2.0465e+07 4.5467e-03  0:02:53   93

divergence detected - temporarily reducing Courant number to 0.5
and trying again...

time step reduced in 32 cells

absolute pressure limited to 5.000000e+010 in 26 cells on zone 2

temperature limited to 5.000000e+003 in 359 cells on zone 2
     8 4.5385e+05 8.1769e+07 1.1784e+08 7.2466e+09 7.0008e-03  0:02:17   92

divergence detected - temporarily reducing Courant number to 0.5
and trying again...

time step reduced in 85 cells

absolute pressure limited to 1.000000e+000 in 2 cells on zone 2

absolute pressure limited to 5.000000e+010 in 102 cells on zone 2

temperature limited to 5.000000e+003 in 483 cells on zone 2

turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 1 cells

Error: Floating point error: invalid number

Error Object: ()
这是怎么回事?问题在哪？如何解决？
跪谢

watercloudsky

reduce relaxaion factor to a very small number, p=0.1, T=0.1 etc

xrs333

原帖由 watercloudsky 于 2010-4-30 13:41 发表

                               
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reduce relaxaion factor to a very small number, p=0.1, T=0.1 etc

这么做不解决问题。通常是分析者对物理问题的理解有问题，所建立的计算模型有问题，也就是物理模型的问题，而不是离散格式或求解方法的问题。