core dumped, please help me. :)

dybull · October 29, 2021, 10:30

When running simpleFoam i am getting a floating point exception (core dummped message)

#0 Foam::error:

rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#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>::solve(Foam::dictionary const&) in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#8 Foam::fvMatrix<double>::solve() in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#9 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
Floating point exception (core dumped)

I cant figure out where i am going wrong. When running check mesh i also get one failure but cant figure out where it is.

I have attached all the files i am using for the problem in the this mod_8 zip. and also attached the files i think are needed for use.
i deleted the polymesh so blockMesh will need to be run.

Lorenzo210 · October 30, 2021, 09:21

Hi,
From lines #3 and #5 it seems that the simulation stopped due to the GAMG solver. Try using smoother DICGaussSiedel instead of gaussSiedel for p in fvSolution.
If it doesn't work, try with PCG solver instead of GAMG, and preconditioner DIC. Let me know if something changes.
Regards,
Lorenzo

dybull · October 30, 2021, 11:30

Lorenzo,
I did as you said for both cases the first one did not solve either, only doing two time iterations. I will include the error message i receive here: (GAMG, DICGaussSiedel)

#0 Foam::error:

rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#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>::solve(Foam::dictionary const&) in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#8 Foam::fvMatrix<double>::solve() in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#9 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
Floating point exception (core dumped)

for the PCG and DIC it ran for about 5 time iterations and then stopped. below is the core cumped message:
#0 Foam::error:

rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 double Foam::sumProd<double>(Foam::UList<double> const&, Foam::UList<double> const&) at ??:?
#4 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#5 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
#6 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#7 Foam::fvMatrix<double>::solve() in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#8 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
#9 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#10 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam"
Floating point exception (core dumped)

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October 30, 2021, 09:21		#2
Lorenzo210 Member Lorenzo Join Date: Apr 2020 Location: Italy Posts: 36 Rep Power: 6	Hi, From lines #3 and #5 it seems that the simulation stopped due to the GAMG solver. Try using smoother DICGaussSiedel instead of gaussSiedel for p in fvSolution. If it doesn't work, try with PCG solver instead of GAMG, and preconditioner DIC. Let me know if something changes. Regards, Lorenzo

October 30, 2021, 11:30		#3
dybull New Member Dylan Join Date: Oct 2021 Posts: 3 Rep Power: 4	Lorenzo, I did as you said for both cases the first one did not solve either, only doing two time iterations. I will include the error message i receive here: (GAMG, DICGaussSiedel) #0 Foam::error:rintStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" #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>::solve(Foam::dictionary const&) in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #8 Foam::fvMatrix<double>::solve() in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #9 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #11 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" Floating point exception (core dumped) for the PCG and DIC it ran for about 5 time iterations and then stopped. below is the core cumped message: #0 Foam::error:rintStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" #3 double Foam::sumProd<double>(Foam::UList<double> const&, Foam::UList<double> const&) at ??:? #4 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #5 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:? #6 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #7 Foam::fvMatrix<double>::solve() in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #8 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" #9 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #10 ? in "/opt/openfoam9/platforms/linux64GccDPInt32Opt/bin/simpleFoam" Floating point exception (core dumped)