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[求助]
激波管模型中加入组分输运模型后发散，求助原因
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如题。我的模型是一个6400X130的长方形，在6400的边附近加密网格。采用基于密度、瞬态的求解器，其他保持默认参数。用patch设置了一个高压段，用以驱动气体。我把model里的species关闭的时候，运算可以进行并且结果还不错。在我激活species之后，将高压段中组分设为Ar，低压端设为N2，想看看二者的分界面的情况，但是运算之后出现以下错误： # Divergence detected in AMG solver: Coupled -> Decreasing coarsening group size! # Divergence detected in AMG solver: Coupled -> Increasing relaxation sweeps! Divergence detected - temporarily reducing Courant number to 0.5 and trying again... time step reduced in 405 cells due to excessive temperature change temperature limited to 5.000000e+03 in 7695 cells on zone 8 Error: F:\PROGRA~2\ANSYSI~1\v145\fluent\fluent14.5.7\win64\2ddp\fl1457s.exe received fatal signal (ACCESS_VIOLATION) 1. Note exact events leading to error. 2. Save case/data under new name. 3. Exit program and restart to continue. 4. Report error to your distributor. Error Object: #f 于是我把time step size调小了10倍，前两行的错误语句消失了，但依旧出现了： 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 1549 in file '..\..\src\rp_mstage.c'. Divergence detected in AMG solver Error Object: #f 求大神帮我分析一下究竟是什么原因导致了运算无法进行？是近壁处网格画的太扁？还是求解器选择的不对？实在是没招了 |
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2楼2013-07-01 11:10:14
3楼2014-12-04 14:23:28
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