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Old   August 27, 2008, 03:38
Default hi guys, i am using
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sivakumar selvaraju
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hi guys,
i am using turbfoam,for last one week but always its giving problem. i tried somany times but its giving same problem,

can you help me to solve the problem?
i have given the problem report



Courant Number mean: 1.03295e+09 max: 1.31013e+15
#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::DILUPreconditioner::calcReciprocalD(Foam::Fi eld<double>&, Foam::lduMatrix const&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#4 Foam::DILUPreconditioner::DILUPreconditioner(Foam: :lduMatrix::solver const&, Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/lib/linux64GccDPOpt/libOpenFOAM. so"
#5 Foam::lduMatrix::preconditioner::addasymMatrixCons tructorToTable<foam::dilupreco nditioner>::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::PBiCG::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<foam::vector<double> >::solve(Foam::Istream&) in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/applications/bin/linux64GccDPOpt /turbFoam"
#9 main in "/home/junkers/selv_si/OpenFOAM1.5/OpenFOAM-1.5/applications/bin/linux64GccDPOpt /turbFoam"
#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 /turbFoam"


regards,
sivakumar
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Old   August 27, 2008, 05:17
Default Hi, sivakumar, What is your
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Ivan Lau
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Hi, sivakumar,

What is your time step? You need to have small time step when fine grid is used.
Do you get this error in the first time step or after few time steps? If it is the first case, you definitely need a smaller time step. Also, try "checkMesh" and see if there is any error.

Cheers,
iL
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Old   August 27, 2008, 05:53
Default hi thank you for u r replay, d
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sivakumar selvaraju
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hi thank you for u r replay, deltaT is 0.005
the calculation stoped at 0.145.

first time i have given deltaT 0.001
the calculation stoped at 0.085

i think the mesh is ok.
the same mesh is working with simpleFoam.

now the calculation going on with deltaT is 0.01
0.4 going on

can u tell me whats wrong with this?

regards,
sivakumar
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Old   August 27, 2008, 07:26
Default i am sorry again it stopped wo
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i am sorry again it stopped working.at 0.05
time step was 0.01
now i have given time step 0.0001
i don't know what will happen.

regards,
sivakumar
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Old   August 27, 2008, 18:52
Default Hello, I think you need to
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Jose Luis Santos
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Hello,

I think you need to provide additional information on your case study, eg. Reynolds number, boundary conditions, turbulence model, etc. That way it will be easier for people to help you solving your problem.

Regards,
Jose Santos
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Old   August 28, 2008, 00:47
Default Hi, sivakumar, is it workin
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Ivan Lau
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Hi, sivakumar,

is it working now?

regards,
iL
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Old   August 28, 2008, 03:51
Default hi, till now there is no p
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sivakumar selvaraju
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hi,
till now there is no problem,its going fine.
i think i have to wait 3 more days to finish the calculation.

i found some mistakes in boundary conditions, but still its working.
for example 2 times INLE5, somany times Value(bigletter),value (small letter)
is it problem or ok?

with regards,
sivakumar
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Old   August 28, 2008, 04:45
Default Hi, Sivakumar, Good to hear t
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Ivan Lau
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Hi, Sivakumar,
Good to hear that it I don't have this problem before, but it should be ok.
regards,
iL
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