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IDProjectCategoryView StatusLast Update
0003731OpenFOAMBugpublic2021-09-19 20:21
ReporterYingWU970709Assigned Tohenry 
Status closedResolutionno change required 
PlatformLinuxOSUbuntuOS Version18.04
Product Version 
Fixed in Version 
Summary0003731: Simulation crash due to convergence problem
DescriptionThe simulation for FSI problem of cylinder would crash with the following report:

#0 Foam::error::printStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/"
#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::lduMatrix::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::dictionary const&) at ??:?
#7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/home/ying/OpenFOAM41/OpenFOAM-4.1/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"
#8 ? in "/home/ying/OpenFOAM41/OpenFOAM-4.1/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"
#9 __libc_start_main in "/lib/x86_64-linux-gnu/"
#10 ? in "/home/ying/OpenFOAM41/OpenFOAM-4.1/platforms/linux64GccDPInt32Opt/bin/pimpleDyMFoam"
Floating point exception (core dumped)

The CFL becomes larger until【mean: 17.9373 max: 29208.7】at the last step before crash.

I try to debug by doing the following modifications:
(1) change boundary conditions of two side walls from symmetry to velocity inlet, but same error happens;
(2) enlarge domain and refine mesh from 20,000 to 80,000 grids, by doing this the case can run more time but the pressure and velocity field are obviously incorrect when visualizing in Paraview and the CFL is about 30, which is also unreasonable.
Steps To Reproduce1. delete log.pimpleDyMFoam and postProcessing folder
2. run Allrun file by "./Allrun"
TagsNo tags attached.



2021-09-19 20:03

reporter (1,549,126 bytes)


2021-09-19 20:17

manager   ~0012198

User support request.

Issue History

Date Modified Username Field Change
2021-09-19 20:03 YingWU970709 New Issue
2021-09-19 20:03 YingWU970709 File Added:
2021-09-19 20:17 henry Assigned To => henry
2021-09-19 20:17 henry Status new => closed
2021-09-19 20:17 henry Resolution open => no change required
2021-09-19 20:17 henry Note Added: 0012198