[sivakumar]

hi guys,
i am getting this problem often for simple Foam as well as turbFoam.

the message is

Time = 243

DILUPBiCG: Solving for Ux, Initial residual = 0.0921126, Final residual = 0.00118057, No Iterations 1
DILUPBiCG: Solving for Uy, Initial residual = 0.0227887, Final residual = 0.000450739, No Iterations 1
DILUPBiCG: Solving for Uz, Initial residual = 0.0322668, Final residual = 0.000457125, No Iterations 1
#0 Foam::error::printStack(Foam:stream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#1 Foam::sigFpe::sigFpeHandler(int) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#2 ?? in "/lib64/libc.so.6"
#3 Foam::DICPreconditioner::calcReciprocalD(Foam::Fie ld<double>&, Foam::lduMatrix const&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#4 Foam::DICPreconditioner::DICPreconditioner(Foam::l duMatrix::solver const&, Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#5 Foam::lduMatrix::preconditioner::addsymMatrixConst ructorToTable<foam::dicprecond itioner>::New(Foam::lduMatrix::solver const&, Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#6 Foam::lduMatrix::preconditioner::New(Foam::lduMatr ix::solver const&, Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#7 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#8 Foam::fvMatrix<double>::solve(Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libfiniteVol ume.so"
#9 main in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/applications/bin/linux64GccDPOpt /simpleFoam"
#10 __libc_start_main in "/lib64/libc.so.6"
#11 Foam::regIOobject::readIfModified() in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/applications/bin/linux64GccDPOpt /simpleFoam"
Fließkommafehler
junkers-selv_si:~/OpenFOAM1.5/selv_si-1.5/run/tutorials/simpleFoam/kabine_withp/ kabine_p_KEpsilon 22:45 >


control

application simpleFoam;

startFrom startTime;

startTime 0;

stopAt endTime;

endTime 1000;

deltaT 1;

writeControl timeStep;

writeInterval 50;

purgeWrite 0;

writeFormat ascii;

writePrecision 6;

writeCompression uncompressed;

timeFormat general;

timePrecision 6;

runTimeModifiable yes;


please help me to rectify this problem.

with regards,
sivakumar

[fra76]

Simply, your simulation diverges, I'm afraid...

[sivakumar]

hello,
how can i solve this problem?


with regards,
sivakumar

[fra76]

You should play with your numerical schemes and/or improve the quality of your mesh.
Try to post here the output of checkMesh and your fvSchemes and fvSolution files. Maybe someone can suggest you some improvement...

[ameya]

Try manipulating internal Field values. My experience with OpenFOAM tells me that the codes are very sensitive to initial values.