[Yanci]

Hello there,
I am simulating a non-Newtonian fluid using nonNewtonianIcoFoam solver. I modify the tansportProperties as follows:

transportModel  powerLaw;

nu              nu [ 0 2 -1 0 0 0 0 ] 1;

powerLawCoeffs
{
    k               k [ 0 2 -1 0 0 0 0 ] 2800;
    n               n [ 0 0 0 0 0 0 0 ] 0.64;
    nuMin           nuMin [ 0 2 -1 0 0 0 0 ] 0.1;
    nuMax           nuMax [ 0 2 -1 0 0 0 0 ] 10000000;
}

But I get the following error information while I running.

Courant Number mean: 111.265 max: 581.185
#0 Foam::error:rintStack(Foam::Ostream&) in "/opt/openfoam230/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#1 Foam::sigFpe::sigHandler(int) in "/opt/openfoam230/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#2 Uninterpreted:
#3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) in "/opt/openfoam230/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<d ouble>&, Foam::Field<double> const&, unsigned char, int) const in "/opt/openfoam230/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam230/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#6
in "/opt/openfoam230/platforms/linuxGccDPOpt/bin/nonNewtonianIcoFoam"
#7
in "/opt/openfoam230/platforms/linuxGccDPOpt/bin/nonNewtonianIcoFoam"
#8
in "/opt/openfoam230/platforms/linuxGccDPOpt/bin/nonNewtonianIcoFoam"
#9
in "/opt/openfoam230/platforms/linuxGccDPOpt/bin/nonNewtonianIcoFoam"
#10 __libc_start_main in "/lib/i386-linux-gnu/libc.so.6"
#11
in "/opt/openfoam230/platforms/linuxGccDPOpt/bin/nonNewtonianIcoFoam"

if I use the powerLaw model in the my simulation, how should I do?

Thanks!
Yongxiao

[Yanci]

I have found the reason of the error.
When I change the "nuMax" to a small number (e.g. 100 or even 10000 ), it can be running without any error. But why? Can someone please explain it?