[suh]

Hello Foamers,
I am using rhoPorousMRFSimpleFoam for compressor simulation. the mesh is came from starccm+ and checkMesh is ok. Then these are my boundary conditions. I am starting with very slow rotational velocity, i.e. w=1 rad/sec.

for p
inlet-zeroGradient,
outlet-fixedValue, $internalField
wall-zeroGradient internalField uniform 2e5;

for U
inlet-fixedValue, uniform (150 0 0)
outlet-zeroGradient,
wall-fixedValue, uniform (0 0 0) internalField uniform (1 10 10)

for T
inlet-totalTemperature, T0 uniform 300, gamma 1.4
outlet-inletOutlet, value $internalField, inletValue $internalField
wall-zeroGradient, internalField uniform 298;

for mut
inlet-calculated uniform 0,
outlet-calculated uniform 0,
wall-mutkWallFunction uniform 0, internalField uniform 0.018;

for k
inlet-fixedValue, uniform 70
outlet-zeroGradient
wall-compressible: :kqRWallFunction uniform 7, internalField uniform 7;

for epsilon
inlet-fixedValue, uniform 19222.91
outlet-zeroGradient
wall-compressible: :epsilonWallFunction uniform 1922.291, internalField uniform 7;

for alphat
inlet-calculated uniform 0,
outlet-calculated uniform 0,
wall-alphatWallFunction uniform 0, internalField uniform 0;


my relaxation factors from fvSolution files are
p 0.1;
rho 1; // I changed this to 0.5 then it ran for about 3500 iterations and then diverges because of thermal properties error message.
U 0.3;
"(k|epsilon)" 0.5;
h 0.5;


and rhomax - 1.9
rhomin - 0.6

and

thermoType hPsiThermo<pureMixture<constTransport<specieThermo <hConstThermo<perfectGas>>>>>;
mixture
{
specie
{
nMoles 1;
molWeight 28.9;
}
thermodynamics
{
Cp 1007;
Hf 2.544e+06;
}
transport
{
mu 0.1835e-04;
Pr 0.72;
}
}

and I am getting this error after 200 iterations.

--> FOAM FATAL ERROR:
Maximum number of iterations exceeded

From function specieThermo<Thermo>::T(scalar f, scalar T0, scalar (specieThermo<Thermo>::*F)(const scalar) const, scalar (s pecieThermo<Thermo>::*dFdT)(const scalar) const) const
in file /opt/software/OpenFOAM/OpenFOAM-2.0.x/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 67.
FOAM aborting
#0 Foam::error:rintStack(Foam::Ostream&) in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/lib/libOpenFOAM.so"
#1 Foam::error::abort() in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/lib/libOpenFOAM.so"
#2 Foam::hPsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::ca lculate() in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/lib/libbasicThermophysicalModels.so"
#3 Foam::hPsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::co rrect() in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/lib/libbasicThermophysicalModels.so"
#4 main in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/bin/rhoPorousMRFSimpleFoam"
#5 __libc_start_main in "/lib64/libc.so.6"
#6 Foam::UOPstream::write(char) in "/share/openfoam/2.0/OpenFOAM/platforms/linux64Gcc45DPOpt/bin/rhoPorousMRFSimpleFoam"
Abort

Please tell me where I am going wrong.
Is anybody using rhoPorousMRFSimpleFoam?

Regards
Suhas

[suh]

Hello Foamers,

Anybody did simulation of compressor using compressible solver of openfoam (main versions)?

I am using OF 2.0.0 and rhoPorousMRFSimpleFoam solver, but I need help to run the simulation.

If anyone has any expirience with this, please give some suggestions...

The simulation is running but there is no pressure increament. why?

Thank you.

[kalyangoparaju]

Hi,

I know this is very late but did you solve your problem. The issue can be with the porosity treatment.

I had a similar problem when I was using explicit porosity treatment for high resistance porous region. Changing it to imnkplicit did the trick.

Kalyan