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各位老大,小弟最近在做高超声速流场分析,用fluent迭代总出现如下错误
0.->1.->2.->3.->4.->5.<<<<<
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 2508 cells
2 7.3503e-01 5.2409e-01 1.0000e+00 1.0000e+00 7.4436e-01 8.3665e-04 1.6680e-02
2:58:53
48
0.->1.->2.->3.->4.->5.<<<<<
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 5572 cells 3 6.1596e-01 3.2578e-01 1.0000e+00 1.0000e+00 6.2597e-01 1.7648e-03 1.6484e-02
2:31:52
47
0.
time step reduced in 229 cells->1.->2.->3.->4.->5.<<<<<
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 18160 cells
6 3.4213e-01 1.7965e-01 7.7446e-01 7.0366e-01 3.3066e-01 5.0451e-03 1.6611e-02
1:39:17
44
0.
time step reduced in 608 cells8 2.8194e-01 1.4804e-01 5.9028e-01 6.0275e-01 2.7358e-01 6.4990e-03 1.7032e-02
1:19:18
42
0.
time step reduced in 619 cells
absolute pressure limited to 1.000000e+000 in 1 cells on zone 2 9 2.6466e-01 1.3616e-01 5.2649e-01 5.5905e-01 2.5549e-01 7.0629e-03 1.7152e-02
1:12:02
41
0.
time step reduced in 614 cells
absolute pressure limited to 1.000000e+000 in 2 cells on zone 2 11 2.3156e-01 1.1894e-01 4.3127e-01 4.7472e-01 2.1349e-01 8.1036e-03 1.7272e-02
1:00:35
39
0.
time step reduced in 628 cells
absolute pressure limited to 1.000000e+000 in 10 cells on zone 2
temperature limited to 5.000000e+003 in 1 cells on zone 2 ->1.->2.->3.->4.->5.<<<<<
iter continuity x-velocity y-velocity z-velocity
energy
k
omega
time/iter
Error: Floating point error: invalid number
Error Object: ()这是怎么回事?另外,同样的模型和网格,我用0.8马赫算的时候就没这个问题,迭代1000多步没报错,把马赫数改成2或者5,其余条件不变,迭代几步就出现这个问题了,我试过增大计算域,改变粘性比,换湍流模型,都不行啊。
以前也有人出现过这个问题,零几年的帖子还有,好像都没怎么解决啊,这是个老问题了,希望真正的高手现现身吧,一堆人等着呢,好人有好报,先谢谢了。
小弟提几个问题,希望高手指点一下。
1,现在的模型长2M,建了个流场区域长120M,半径30M的圆柱,pressure-far-field边界条件,应该够大吧?
2,turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 2508 cells
time step reduced in 628 cells
absolute pressure limited to 1.000000e+000 in 10 cells on zone 2
temperature limited to 5.000000e+003 in 1 cells on zone 2
出现这种情况是什么原因?
有什么解决办法?
3,高马赫数的比热和热传导率不能再设成常数,应该怎么设置?
真心希望高手现身,以后如果有用得着小弟的地方,小弟一定全力以赴。 |
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