[Hr_kules]

Hi,


i have a pretty general question regarding the fvsolution file. I mostly worked from tutorial cases and chaged them according to my needs in terms of mesh and boundary conditions. However i am uncertain how one would choose configurations like the following:

solvers
{
    p
    {
        solver           GAMG;
        smoother         symGaussSeidel;
        tolerance        1e-7;
        relTol           0.01;
    }

    "(U|h|k|epsilon).*"
    {
        solver           PBiCGStab;
        preconditioner   DILU;
        tolerance        1e-7;
        relTol           0.1;
    }
}

Are there any ressources that touch that topic?

[dlahaye]

pressure in incompressible case: matrix is symmetric and positive definite: pressure is best solved using GAMG as preconditioner for CG in sequential;

pressure in compressible case, velocity components and parallel computing: use DILU as preconditioner for PBiCGStab;

Literature on the matter is vast. Possible entry point is https://netlib.org/templates/templates.pdf and references listed.