[Carno]

HI All,

I have been trying to solve a CHT problem, with air, water and solid. It is a test case before solving the main problem. It is a simple box with two tubes. Box is of steel and two tubes contain water and gas respectively.

I have solved the case with Laminar case and results are reasonable. But as soon as I twitched on turbulence model with "turbulence true;" in the turbulence properties dict, the run crashes.

I have tried numerous combinations. The run goes well when "turbulence false;"

Please help !

[Jack80]

Turbulence= true?

Upload your turbulence files and the log of the error you're getting.

What turbulence model are you using?

[Carno]

FoamFile
{
    version    2.0;
    class    dictionary;
    format    ascii;
    location    "constant";
    object    turbulenceProperties;
}
simulationType    RAS;
RAS
{
    printCoeffs    on;
    RASModel    kEpsilon;
    turbulence    true;
    kEpsilonCoeffs
    {
        C3    -0.33;
        Cmu    0.09;
        sigmak    1.0;
        C1    1.44;
        sigmaEps    1.3;
        C2    1.92;
    }
}

Time = 7


Solving for fluid region gas
DILUPBiCG:  Solving for Ux, Initial residual = 0.9998339, Final residual = 6.225594e-005, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 0.9997901, Final residual = 9.356765e-005, No Iterations 1
DILUPBiCG:  Solving for Uz, Initial residual = 0.9999247, Final residual = 6.460889e-005, No Iterations 1
DILUPBiCG:  Solving for h, Initial residual = 1, Final residual = 4.503303e-005, No Iterations 1
Min/max T:300 650
DICPCG:  Solving for p_rgh, Initial residual = 1, Final residual = 9.244747e-005, No Iterations 259
DICPCG:  Solving for p_rgh, Initial residual = 2.396295e-005, Final residual = 8.989188e-007, No Iterations 20
DICPCG:  Solving for p_rgh, Initial residual = 8.997803e-007, Final residual = 8.997803e-007, No Iterations 0
DICPCG:  Solving for p_rgh, Initial residual = 8.997803e-007, Final residual = 8.997803e-007, No Iterations 0
time step continuity errors : sum local = 1.405708e+047, global = 6.975396e+042, cumulative = 6.975396e+042
Min/max rho:0.5365993 1.16163
DILUPBiCGStab:  Solving for epsilon, Initial residual = 1, Final residual = 4.706257e-008, No Iterations 6
bounding epsilon, min: -3.629814e+084 max: 2.95134e+086 average: 6.291088e+081
DILUPBiCGStab:  Solving for k, Initial residual = 1, Final residual = 5.365471e-008, No Iterations 5
bounding k, min: -4.599895e+068 max: 3.286911e+090 average: 2.401271e+066

Solving for fluid region water
DILUPBiCG:  Solving for Ux, Initial residual = 0.9992455, Final residual = 8.898344e-005, No Iterations 5
DILUPBiCG:  Solving for Uy, Initial residual = 0.9928763, Final residual = 8.119978e-005, No Iterations 5
DILUPBiCG:  Solving for Uz, Initial residual = 0.9997006, Final residual = 7.40432e-005, No Iterations 5
DILUPBiCG:  Solving for h, Initial residual = 1, Final residual = nan, No Iterations 1001
Min/max T:300 650
DICPCG:  Solving for p_rgh, Initial residual = 1, Final residual = nan, No Iterations 501
DICPCG:  Solving for p_rgh, Initial residual = nan, Final residual = nan, No Iterations 501


--> FOAM FATAL IO ERROR: 
wrong token type - expected Scalar, found on line 0 the word 'nan'

file: E:/water/data.solverPerformance.p_rgh at line 0.

--> FOAM Warning : 
    From function Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::doubleScalar&)
    in file lnInclude/Scalar.C at line 107.

FOAM exiting

I have attached the turbulence model details and error messages... It crashes after few iterations..

[Carno]

Are these warnings anything to do with this problem?
I am using windows version.

--> FOAM Warning :
    From function dlOpen(const fileName&, const bool)
    in file MSwindows.C at line 1313
\   dlopen error : "Error 126: The specified module could not be found.
"
--> FOAM Warning :
    From function dlLibraryTable::open(const fileName&, const bool)
    in file db/dynamicLibrary/dlLibraryTable/dlLibraryTable.C at line 99
    could not load "libturbulenceModelSchemes.dll"

[Jack80]

From your log, it seems like there is something wrong with this file:

"E:/Speed/08_Work/SimTest/Test/Test/system/water/data.solverPerformance.p_rgh"

I'm not sure if this is a file from the set up (it seems like there is some divergence in the simulation) but if it is, please upload it so I can take a look. Or better yet, upload your case

[Carno]

Thanks for the reply. I do not see any such file. How can upload the case? Give me some idea.. It is 11 MB