# rhoPimpleFoam error

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 October 14, 2019, 17:33 rhoPimpleFoam error #1 New Member   anonymous Join Date: Sep 2019 Location: North Carolina Posts: 25 Rep Power: 4 Hi I'm running a simulation based off the compressible angled duct tutorial opt/openfoam/tutorial/compressible/rhoPimpleFoam/RAS and after I run my simulation I get this error after it runs for a little bit. I'm going to go back and do my best to check boundary conditions and such but I'm having trouble interpreting what the error is.. Can anyone shed some light on what is going on? Or how to pin point where the issue is? Code: PIMPLE: Iteration 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 1.00633e-06, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 6.60958e-08, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 9.32762e-07, No Iterations 1 smoothSolver: Solving for e, Initial residual = 1.88026e-05, Final residual = 1.66735e-05, No Iterations 1000 DICPCG: Solving for p, Initial residual = 1, Final residual = 8.08526e-08, No Iterations 36 pressureControl: p max 111312 diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = 1, global = 1, cumulative = 1 smoothSolver: Solving for epsilon, Initial residual = 0.0592555, Final residual = 0.00422045, No Iterations 3 bounding epsilon, min: -3.03429e+06 max: 5.95861e+09 average: 5.73871e+07 smoothSolver: Solving for k, Initial residual = 1, Final residual = 0.00379042, No Iterations 1 PIMPLE: Iteration 2 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0648606, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.728353, Final residual = 0.0291832, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0682855, No Iterations 3 smoothSolver: Solving for e, Initial residual = 1, Final residual = 0.0912548, No Iterations 2 DICPCG: Solving for p, Initial residual = 1, Final residual = 8.73524e-08, No Iterations 351 pressureControl: p max 1.34117e+10 diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = 1, global = 1, cumulative = 2 smoothSolver: Solving for epsilon, Initial residual = 0.00103145, Final residual = 3.97863e-05, No Iterations 2 bounding epsilon, min: -1.03555e+14 max: 1.75415e+18 average: 4.29224e+16 smoothSolver: Solving for k, Initial residual = 0.18778, Final residual = 0.0125959, No Iterations 1 PIMPLE: Iteration 3 smoothSolver: Solving for Ux, Initial residual = 0.000738524, Final residual = 4.67996e-05, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 6.19699e-05, Final residual = 3.1511e-06, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.00113877, Final residual = 6.69982e-05, No Iterations 1 smoothSolver: Solving for e, Initial residual = 0.0459777, Final residual = 0.00275765, No Iterations 1 DICPCG: Solving for p, Initial residual = 1, Final residual = 5.21854e-08, No Iterations 9 pressureControl: p max 1.10319e+11 diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = 1, global = 1, cumulative = 3 smoothSolver: Solving for epsilon, Initial residual = 0.000701229, Final residual = 1.91923e-05, No Iterations 2 bounding epsilon, min: -4.30382e+17 max: 8.88497e+19 average: 1.01591e+18 smoothSolver: Solving for k, Initial residual = 0.335667, Final residual = 0.029473, No Iterations 1 PIMPLE: Iteration 4 smoothSolver: Solving for Ux, Initial residual = 0.0134738, Final residual = 0.000197854, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.000512107, Final residual = 2.11432e-05, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.16274, Final residual = 0.00241396, No Iterations 1 smoothSolver: Solving for e, Initial residual = 0.0215283, Final residual = 0.00157497, No Iterations 1 [7] #0 Foam::error::printStack(Foam::Ostream&) at ??:? [7] #1 Foam::sigFpe::sigHandler(int) at ??:? [7] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [7] #3 Foam::hePsiThermo >, Foam::sensibleInternalEnergy> > > >::calculate() at ??:? [7] #4 Foam::hePsiThermo >, Foam::sensibleInternalEnergy> > > >::correct() at ??:? [7] #5 ? in "/opt/openfoam7/platforms/linux64GccDPInt32Opt/bin/rhoPimpleFoam" [7] #6 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" [7] #7 ? in "/opt/openfoam7/platforms/linux64GccDPInt32Opt/bin/rhoPimpleFoam" [taylor-Precision-T1700:31634] *** Process received signal *** [taylor-Precision-T1700:31634] Signal: Floating point exception (8) [taylor-Precision-T1700:31634] Signal code: (-6) [taylor-Precision-T1700:31634] Failing at address: 0x3e800007b92 [taylor-Precision-T1700:31634] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fd0d5ef5f20] [taylor-Precision-T1700:31634] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fd0d5ef5e97] [taylor-Precision-T1700:31634] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fd0d5ef5f20] [taylor-Precision-T1700:31634] [ 3] /opt/openfoam7/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x1e2)[0x7fd0dbfe6b02] [taylor-Precision-T1700:31634] [ 4] /opt/openfoam7/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7fd0dc01c58a] [taylor-Precision-T1700:31634] [ 5] rhoPimpleFoam(+0x2d621)[0x557083b6f621] [taylor-Precision-T1700:31634] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fd0d5ed8b97] [taylor-Precision-T1700:31634] [ 7] rhoPimpleFoam(+0x3514a)[0x557083b7714a] [taylor-Precision-T1700:31634] *** End of error message *** -------------------------------------------------------------------------- mpirun noticed that process rank 7 with PID 0 on node taylor-Precision-T1700 exited on signal 8 (Floating point exception). --------------------------------------------------------------------------

 October 17, 2019, 01:17 #2 Senior Member   Ruiyan Chen Join Date: Jul 2016 Location: Hangzhou, China Posts: 157 Rep Power: 7 In the very first PIMPLE iteration you have 1000 iterations running to try to get the e field to converge, that normally signals ill-posed boundary conditions somewhere. What are you simulating? What are the boundary conditions?

 October 17, 2019, 04:11 #3 Senior Member   Carlo_P Join Date: May 2019 Location: Italy Posts: 176 Rep Power: 5 Yu have also only 1 iteration in the velocity. Reduce the value in the FvSolution of relTol and tolerance in the solver/U command. This can help, but as suggested, seems that you have a bigger errors somewhere. Is the mesh ok? Did you run checkMesh?

 Tags compressible flow, openfoam, ras, turbulence