[jd_vaghasiya]

I have run buoyantPimpleFoam simulation and use:
startTime: 0
endtime: 500
deltaT: 0.01
writeInterval: 5

then simulation was run sucssefully.but after that i want to use

startTime: 0
endtime: 18000

now i am facing some problem and not running simulation. please anyone have any solution then guide me.

[überschwupper]

Originally Posted by jd_vaghasiya

I have run buoyantPimpleFoam simulation and use:
startTime: 0
endtime: 500
deltaT: 0.01
writeInterval: 5

then simulation was run sucssefully.but after that i want to use

startTime: 0
endtime: 18000

now i am facing some problem and not running simulation. please anyone have any solution then guide me.

Can you please post your error message

[jd_vaghasiya]

here you can find the attachment of the log file.

[jd_vaghasiya]

Originally Posted by überschwupper

Can you please post your error message

Courant Number mean: 0.000171556 max: 5.99997
Time = 86.5055

diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCGStab: Solving for Ux, Initial residual = 1.1103e-05, Final residual = 1.12525e-09, No Iterations 1
DILUPBiCGStab: Solving for Uy, Initial residual = 8.54981e-06, Final residual = 1.01351e-09, No Iterations 1
DILUPBiCGStab: Solving for Uz, Initial residual = 6.25258e-06, Final residual = 7.03431e-10, No Iterations 1
DILUPBiCGStab: Solving for h, Initial residual = 5.12811e-06, Final residual = 1.5651e-09, No Iterations 1
DICPCG: Solving for p_rgh, Initial residual = 0.000918175, Final residual = 0.000918175, No Iterations 0
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.56108e-10, global = -2.96827e-11, cumulative = -1.32818e-05
DICPCG: Solving for p_rgh, Initial residual = 0.000918171, Final residual = 0.000918171, No Iterations 0
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.56106e-10, global = -2.96828e-11, cumulative = -1.32818e-05
DILUPBiCGStab: Solving for omega, Initial residual = 1.00009e-06, Final residual = 5.20401e-11, No Iterations 1
DILUPBiCGStab: Solving for k, Initial residual = 4.03133e-05, Final residual = 5.18814e-09, No Iterations 1
ExecutionTime = 32440.9 s ClockTime = 32973 s

Courant Number mean: 0.00017156 max: 5.99997
Time = 86.5074

diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCGStab: Solving for Ux, Initial residual = 1.11029e-05, Final residual = 1.12504e-09, No Iterations 1
DILUPBiCGStab: Solving for Uy, Initial residual = 8.55075e-06, Final residual = 1.01357e-09, No Iterations 1
DILUPBiCGStab: Solving for Uz, Initial residual = 6.25451e-06, Final residual = 7.03589e-10, No Iterations 1
DILUPBiCGStab: Solving for h, Initial residual = 5.12812e-06, Final residual = 1.56507e-09, No Iterations 1
DICPCG: Solving for p_rgh, Initial residual = 0.00101466, Final residual = 0.000981534, No Iterations 1
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.80688e-10, global = -2.96528e-11, cumulative = -1.32818e-05
DICPCG: Solving for p_rgh, Initial residual = 0.000788218, Final residual = 0.000788218, No Iterations 0
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.05724e-10, global = -2.9683e-11, cumulative = -1.32819e-05
[58] #0 Foam::error::printStack(Foam::Ostream&) at ??:?
[58] #1 Foam::sigFpe::sigHandler(int) at ??:?
[58] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
[58] #3 ? in "/lib/x86_64-linux-gnu/libm.so.6"
[58] #4 Foam::omegaWallFunctionFvPatchScalarField::calcula te(Foam::momentumTransportModel const&, Foam::List<double> const&, Foam::fvPatch const&, Foam::Field<double>&, Foam::Field<double>&) at ??:?
[58] #5 Foam::omegaWallFunctionFvPatchScalarField::calcula teTurbulenceFields(Foam::momentumTransportModel const&, Foam::Field<double>&, Foam::Field<double>&) at ??:?
[58] #6 Foam::omegaWallFunctionFvPatchScalarField::updateC oeffs() at ??:?
[58] #7 Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::Boundary::updateCoeffs() at ??:?
[58] #8 Foam::kOmegaSST<Foam::eddyViscosity<Foam::RASModel <Foam::CompressibleMomentumTransportModel<Foam::dy namicTransportModel> > >, Foam::CompressibleMomentumTransportModel<Foam::dyn amicTransportModel> >::correct() at ??:?
[58] #9 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/buoyantPimpleFoam"
[58] #10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
[58] #11 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/buoyantPimpleFoam"
[cfdserver:169821] *** Process received signal ***
[cfdserver:169821] Signal: Floating point exception (8)
[cfdserver:169821] Signal code: (-6)
[cfdserver:169821] Failing at address: 0x3e90002975d
[cfdserver:169821] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x43090)[0x7f83222a3090]
[cfdserver:169821] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f83222a300b]
[cfdserver:169821] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x43090)[0x7f83222a3090]
[cfdserver:169821] [ 3] /lib/x86_64-linux-gnu/libm.so.6(+0x7c470)[0x7f83224f4470]
[cfdserver:169821] [ 4] /opt/openfoam9/platforms/linux64GccDPInt32Opt/lib/libmomentumTransportModels.so(_ZN4Foam35omegaWallF unctionFvPatchScalarField9calculateERKNS_22momentu mTransportModelERKNS_4ListIdEERKNS_7fvPatchERNS_5F ieldIdEESD_+0x426)[0x7f8325853ba6]
[cfdserver:169821] [ 5] /opt/openfoam9/platforms/linux64GccDPInt32Opt/lib/libmomentumTransportModels.so(_ZN4Foam35omegaWallF unctionFvPatchScalarField25calculateTurbulenceFiel dsERKNS_22momentumTransportModelERNS_5FieldIdEES6_ +0x75)[0x7f8325853655]
[cfdserver:169821] [ 6] /opt/openfoam9/platforms/linux64GccDPInt32Opt/lib/libmomentumTransportModels.so(_ZN4Foam35omegaWallF unctionFvPatchScalarField12updateCoeffsEv+0x28e)[0x7f83258546ae]
[cfdserver:169821] [ 7] /opt/openfoam9/platforms/linux64GccDPInt32Opt/lib/libcompressibleMomentumTransportModels.so(_ZN4Foam 14GeometricFieldIdNS_12fvPatchFieldENS_7volMeshEE8 Boundary12updateCoeffsEv+0x72)[0x7f832555c242]
[cfdserver:169821] [ 8] /opt/openfoam9/platforms/linux64GccDPInt32Opt/lib/libcompressibleMomentumTransportModels.so(_ZN4Foam 9kOmegaSSTINS_13eddyViscosityINS_8RASModelINS_34Co mpressibleMomentumTransportModelINS_21dynamicTrans portModelEEEEEEES5_E7correctEv+0x36f)[0x7f8325646b3f]
[cfdserver:169821] [ 9] buoyantPimpleFoam(+0x43170)[0x559044b2b170]
[cfdserver:169821] [10] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f8322284083]
[cfdserver:169821] [11] buoyantPimpleFoam(+0x4627e)[0x559044b2e27e]
[cfdserver:169821] *** End of error message ***
--------------------------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun noticed that process rank 58 with PID 0 on node cfdserver exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------

[exited with status 136.]

[überschwupper]

You say, you just adjusted the endtime right? Maybe start your simulation from the successfull simulation from timestep 500 to 1800. MAybe this will work out.


Beside that: Your local courant number is pretty high. Some discretization shemes need a courant number below 1 or 0.5 otherwise they become unstable. This relates to the propagation of the quantity which would otherwise become unphysical.


You should check where the high courant number occurs in your mesh and consider to refine that region