[dewey]

Hello., im trying to simulate a pipe with porous media and heat transfer using buoyant simplefoam with fvoptions porousmedia.

Do you know why the simulation stop?
I dont understand what means that error.

thank u for your time


Time = 26

DILUPBiCG: Solving for Ux, Initial residual = 0.0623969, Final residual = 0.000334212, No Iterations 1
DILUPBiCG: Solving for Uy, Initial residual = 0.101444, Final residual = 0.000653273, No Iterations 1
DILUPBiCG: Solving for Uz, Initial residual = 0.149451, Final residual = 0.000506783, No Iterations 1
DILUPBiCG: Solving for h, Initial residual = 0.00689413, Final residual = 1.16579e-05, No Iterations 2
GAMG: Solving for p_rgh, Initial residual = 0.14369, Final residual = 0.00132583, No Iterations 4
time step continuity errors : sum local = 0.0131216, global = 0.00379873, cumulative = 0.00339527
rho max/min : 2.66735 0.225983
ExecutionTime = 336.84 s ClockTime = 389 s

Time = 27

DILUPBiCG: Solving for Ux, Initial residual = 0.0921637, Final residual = 0.000623586, No Iterations 1
DILUPBiCG: Solving for Uy, Initial residual = 0.12727, Final residual = 0.00119562, No Iterations 1
DILUPBiCG: Solving for Uz, Initial residual = 0.277155, Final residual = 0.00148346, No Iterations 1
DILUPBiCG: Solving for h, Initial residual = 0.00678693, Final residual = 6.33452e-06, No Iterations 2
[0] #0 Foam::error:rintStack(Foam::Ostream&) at ??:?
[0] #1 Foam::sigFpe::sigHandler(int) at ??:?
[0] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
[0] #3 Foam::GAMGSolver::scale(Foam::Field<double>&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, Foam::Field<double> const&, unsigned char) const at ??:?
[0] #4 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMa trix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const at ??:?
[0] #5 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
[0] #6 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
[0] #7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
[0] #8 Foam::fvMatrix<double>::solve() at ??:?
[0] #9 ? at ??:?
[0] #10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
[0] #11 ? at ??:?
[Guacamaya:09486] *** Process received signal ***
[Guacamaya:09486] Signal: Floating point exception (8)
[Guacamaya:09486] Signal code: (-6)
[Guacamaya:09486] Failing at address: 0x3e80000250e
[Guacamaya:09486] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f0ff0dce4b0]
[Guacamaya:09486] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f0ff0dce428]
[Guacamaya:09486] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f0ff0dce4b0]
[Guacamaya:09486] [ 3] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver5scaleERNS_5Fi eldIdEES3_RKNS_9lduMatrixERKNS_10FieldFieldIS1_dEE RKNS_8UPtrListIKNS_17lduInterfaceFieldEEERKS2_h+0x ce)[0x7f0ff2039b4e]
[Guacamaya:09486] [ 4] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver6VcycleERKNS_7 PtrListINS_9lduMatrix8smootherEEERNS_5FieldIdEERKS 8_S9_S9_S9_S9_S9_RNS1_IS8_EESD_h+0x7b2)[0x7f0ff203ddb2]
[Guacamaya:09486] [ 5] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver5solveERNS_5Fi eldIdEERKS2_h+0x86d)[0x7f0ff204070d]
[Guacamaya:09486] [ 6] /opt/openfoam4/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE15solveSegr egatedERKNS_10dictionaryE+0x15b)[0x7f0ff5a5f95b]
[Guacamaya:09486] [ 7] buoyantSimpleFoam(_ZN4Foam8fvMatrixIdE5solveERKNS_ 10dictionaryE+0x191)[0x493971]
[Guacamaya:09486] [ 8] buoyantSimpleFoam(_ZN4Foam8fvMatrixIdE5solveEv+0x1 35)[0x493c25]
[Guacamaya:09486] [ 9] buoyantSimpleFoam[0x4306bc]
[Guacamaya:09486] [10] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f0ff0db9830]
[Guacamaya:09486] [11] buoyantSimpleFoam[0x433539]
[Guacamaya:09486] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 0 with PID 9486 on node Guacamaya exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------

[alexeym]

Hi,

You simulation diverges. Reason? Could be lots of. You can start by going from GAMG to PCG (btw what is your settings for GAMG?). Then post your IC/BC, maybe there is a problem.