simpleFoam crashing

saurcerer · November 10, 2022, 00:11

Hi everyone,

I am running a simpleFoam case of a flow through a pipe that is 30nm in diameter. It is encountering a crash as I have pasted below. Please help me understand what it means and how can I rectify the error. The case is very simple, just the length-scale of the physics is really small.

Time = 1

smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0876985, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 0.0948737, No Iterations 3
smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0951056, No Iterations 3
#0 Foam::error:

rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in /lib/x86_64-linux-gnu/libpthread.so.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 ??:?
#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 ??:?
#5 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#6 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
#7 Foam::fvMatrix<double>::solveSegregatedOrCoupled(F oam::dictionary const&) at ??:?
#8 Foam::fvMesh::solve(Foam::fvMatrix<double>&, Foam::dictionary const&) const at ??:?
#9 ? in /usr/lib/openfoam/openfoam2106/platforms/linux64GccDPInt32Opt/bin/simpleFoam
#10 __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
#11 ? in /usr/lib/openfoam/openfoam2106/platforms/linux64GccDPInt32Opt/bin/simpleFoam
Floating point exception (core dumped)

keitaro7_14 · November 10, 2022, 06:02

I guess the problem is the boundary conditions. But I would follow the following steps:

Check the tutorial angleDuct and the boundary conditions.

Try to reproduce a problem like this:

https://skill-lync.com/blogs/simulat...using-openfoam

If It works, and your case produces a crash, the reason could be the size of the problem. Try to scale your problem.

November 10, 2022, 00:11	simpleFoam crashing	#1
saurcerer New Member Aniruddha Saha Join Date: Mar 2022 Posts: 9 Rep Power: 4	Hi everyone, I am running a simpleFoam case of a flow through a pipe that is 30nm in diameter. It is encountering a crash as I have pasted below. Please help me understand what it means and how can I rectify the error. The case is very simple, just the length-scale of the physics is really small. Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0876985, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 0.0948737, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0951056, No Iterations 3 #0 Foam::error:rintStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in /lib/x86_64-linux-gnu/libpthread.so.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 ??:? #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 ??:? #5 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #6 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:? #7 Foam::fvMatrix<double>::solveSegregatedOrCoupled(F oam::dictionary const&) at ??:? #8 Foam::fvMesh::solve(Foam::fvMatrix<double>&, Foam::dictionary const&) const at ??:? #9 ? in /usr/lib/openfoam/openfoam2106/platforms/linux64GccDPInt32Opt/bin/simpleFoam #10 __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6 #11 ? in /usr/lib/openfoam/openfoam2106/platforms/linux64GccDPInt32Opt/bin/simpleFoam Floating point exception (core dumped)

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November 10, 2022, 06:02		#2
keitaro7_14 Member JuanMi Join Date: Nov 2017 Posts: 41 Rep Power: 9	I guess the problem is the boundary conditions. But I would follow the following steps: Check the tutorial angleDuct and the boundary conditions. Try to reproduce a problem like this: https://skill-lync.com/blogs/simulat...using-openfoam If It works, and your case produces a crash, the reason could be the size of the problem. Try to scale your problem.