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simpleFoam convergance troubles.

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Old   December 1, 2010, 14:37
Default simpleFoam convergance troubles.
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Jason G.
Join Date: Sep 2009
Location: St. Louis, IL
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I have been trying to get back into using OpenFOAM after being away from it for several months, and I am having some difficulties while using simpleFoam. The case uses the simpleFoam solver set for laminar flow with 1 inlet and 4 outlet boundary conditions.

Attached is a clipped view showing the velocity and pressure magnitudes at the last iteration prior to crashing. The residual plot shows that my p residual was unable to converge at the specified tolerance, and then eventually crashed.

Does the error message below indicate anything obviously wrong with the setup of the model or a boundary condition? I am trying to determine if my mesh has issues, or if one of my boundary conditions is erroneous.


__________________________________________________ ____________________
Time = 232

smoothSolver: Solving for Ux, Initial residual = 0.448189, Final residual = 0.000520345, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.536472, Final residual = 0.00101717, No Iterations 2
smoothSolver: Solving for Uz, Initial residual = 0.638983, Final residual = 0.00085336, No Iterations 2
GAMG: Solving for p, Initial residual = 0.988656, Final residual = 9.96993e+66, No Iterations 100
GAMG: Solving for p, Initial residual = 0.913884, Final residual = 1.33824e+72, No Iterations 100
#0 Foam::error:rintStack(Foam::Ostream&) in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#1 Foam::sigFpe::sigFpeHandler(int) in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#2 Uninterpreted:
#3 Foam::GAMGSolver::scalingFactor(Foam::Field<double >&, Foam::Field<double> const&, Foam::Field<double> const&, Foam::Field<double> const&) const in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#4 Foam::GAMGSolver::scalingFactor(Foam::Field<double >&, Foam::lduMatrix const&, Foam::Field<double>&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#5 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::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#6 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam170/lib/linuxGccDPOpt/libfiniteVolume.so"
#8
in "/opt/openfoam170/applications/bin/linuxGccDPOpt/simpleFoam"
#9 __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
#10
in "/opt/openfoam170/applications/bin/linuxGccDPOpt/simpleFoam"
__________________________________________________ _________________
Attached Images
File Type: jpg Residuals.jpg (32.1 KB, 130 views)
File Type: jpg U_mag.jpg (47.7 KB, 120 views)
File Type: jpg p.jpg (47.2 KB, 82 views)
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