[Cenzy]

Hello, i have a problem during the simulation. At time step 120 appears this error:

PHP Code:

Time = 119

DILUPBiCG:  Solving for Ux, Initial residual = 0.0139645, Final residual = 0.000177782, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 0.0695692, Final residual = 0.00149629, No Iterations 1
DILUPBiCG:  Solving for Uz, Initial residual = 0.00854331, Final residual = 0.000104617, No Iterations 1
DILUPBiCG:  Solving for T, Initial residual = 1.82591e-05, Final residual = 1.04656e-06, No Iterations 1
DICPCG:  Solving for p_rgh, Initial residual = 0.00275292, Final residual = 2.67241e-05, No Iterations 104
time step continuity errors : sum local = 1.81111e+20, global = -1.38938e+14, cumulative = -1.38938e+14
DILUPBiCG:  Solving for epsilon, Initial residual = 8.46206e-05, Final residual = 5.14476e-07, No Iterations 1
DILUPBiCG:  Solving for k, Initial residual = 0.0547818, Final residual = 0.0014389, No Iterations 2
ExecutionTime = 33.6 s  ClockTime = 34 s

Time = 120

DILUPBiCG:  Solving for Ux, Initial residual = 0.0676242, Final residual = 0.00181908, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 0.151587, Final residual = 0.00257395, No Iterations 1
DILUPBiCG:  Solving for Uz, Initial residual = 0.138446, Final residual = 0.00143008, No Iterations 1
DILUPBiCG:  Solving for T, Initial residual = 0.0807921, Final residual = 0.00076082, No Iterations 1
#0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2   in "/lib/x86_64-linux-gnu/libc.so.6"
#3  Foam::DICPreconditioner::calcReciprocalD(Foam::Field<double>&, Foam::lduMatrix const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  Foam::DICPreconditioner::DICPreconditioner(Foam::lduMatrix::solver const&, Foam::dictionary const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5  Foam::lduMatrix::preconditioner::addsymMatrixConstructorToTable<Foam::DICPreconditioner>::New(Foam::lduMatrix::solver const&, Foam::dictionary const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#6  Foam::lduMatrix::preconditioner::New(Foam::lduMatrix::solver const&, Foam::dictionary const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#7  Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#8  Foam::fvMatrix<double>::solveSegregated(Foam::dictionary const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
#9  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam221/platforms/linux64GccDPOpt/bin/buoyantBoussinesqSimpleFoam"
#10  
 at buoyantBoussinesqSimpleFoam.C:0
#11  
 in "/opt/openfoam221/platforms/linux64GccDPOpt/bin/buoyantBoussinesqSimpleFoam"
#12  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" 


Can someone help me?
the case consist in mixing of two turbulent flows of water at different velocity and temperature, in correspondence of a curve at 90 ◦ of a to duct. The solver is buoyantBoussinesqSimpleFoam and the model of turbolence is k − ε

[jherb]

The log file shows that your problem is already caused in the previous time steps. What are your boundary conditions? The mesh quality? When does the continuity error start to explode?

Originally Posted by Cenzy

Hello, i have a problem during the simulation. At time step 120 appears this error:

PHP Code:

Time = 119

...
time step continuity errors : sum local = 1.81111e+20, global = -1.38938e+14, cumulative = -1.38938e+14
...

Time = 120

...
#0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam221/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" 


Can someone help me?
the case consist in mixing of two turbulent flows of water at different velocity and temperature, in correspondence of a curve at 90 ◦ of a to duct. The solver is buoyantBoussinesqSimpleFoam and the model of turbolence is k − ε