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parallel run issue for code with structure of chtmultiregionfoam + boussinesqpimplefo |
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December 24, 2016, 03:50 |
parallel run issue for code with structure of chtmultiregionfoam + boussinesqpimplefo
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Senior Member
Manu Chakkingal
Join Date: Feb 2016
Location: Delft, Netherlands
Posts: 129
Rep Power: 10 |
Hello
I have a new solver with structure of chtMultiregionfoam which behaves like bouyantboussinesqpimplefoam for fluid region. I ran the simulations in series and the solution converges. When I try to run it in parallel it crashes in the first step. Used OF2.4.0 I tried to reduce the courant number to attain initial stability , but then the solver crashes after 2nd time step. Code:
: Test1 deltaT = 4.5530327e-107 Test2 --> FOAM Warning : From function Time::operator++() in file db/Time/Time.C at line 1061 Increased the timePrecision from 62 to 63 to distinguish between timeNames at time 2.0707573e-07 Time = 2.07075734119138104400662664383858668770699296146631240844726562e-07 Solving for fluid region air DILUPBiCG: Solving for T, Initial residual = 0.010403611, Final residual = 2.7324966e-12, No Iterations 1 max(T) [0 0 0 1 0 0 0] 300.02011 DICPCG: Solving for p_rgh, Initial residual = 1, Final residual = 0.0099236724, No Iterations 251 time step continuity errors : sum local = 5.0400286e-07, global = 1.0693134e-19 -------------------------------------------------------------------------- mpirun noticed that process rank 4 with PID 17152 on node n11-42 exited on signal 8 (Floating point exception). Could someone help to identify if its a fvSolution setting issue. I tried GAMG with DIluGaussSeidel for U, PCG for Temperature in the fvSlution. I am stuck for more than a month Couldnt find any suggestions in the forum helping me.. problem solved: Temperature anomoly at pressure reference cell
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Regards Manu Last edited by manuc; December 30, 2016 at 02:07. |
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