CFD Online Discussion Forums - Numerical Schemes in Order of Accuracy

Hello !

I'm looking for some information concerning the FvSchemes, where we define the numerical schemes used in the simulation. In my case i'm running the simpleFoam for a mesh of 145.859 tetrahedrical elements and the quality is acceptable. It would be very helpful for me some tips or even a guide around it's numerical schemes.

To simplify, i'd would like to know, ordering from the lesser to the most accurate numerical scheme used in simpleFoam and thus improve my results.

Thank you!

I'm currently using these on mine:

Code:

FoamFile

{

    format      ascii;

    class       dictionary;

    location    "system";

    object      fvSchemes;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



ddtSchemes

{

    default         steadyState;

}



gradSchemes

{

    default         Gauss linear;

}



divSchemes

{

    default         none;

    div(phi,U)      bounded Gauss upwind;

    div(phi,k)      bounded Gauss upwind;

    div(phi,epsilon) bounded Gauss upwind;

    div((nuEff*dev2(T(grad(U))))) Gauss linear;



    div(phi,age)    bounded Gauss upwind;

}





laplacianSchemes

{

    default         Gauss linear corrected;

}



interpolationSchemes

{

    default         linear;

}



snGradSchemes

{

    default         corrected;

}



wallDist

{

    method meshWave;

}