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Test case set-up
- Test case is preset
- Copy the initial conditions in 0.orig/ to 0/ :
# cp -r 0.orig/* 0
- Run in parallel
- In file system/decomposeParDict set number of regions e.g. to 2. You have to update the hierarchicalCoeffs so as their product gives desired number of subdomains.
- Decomposition method hierarchical
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: dev | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object decomposeParDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // numberOfSubdomains 2; method hierarchical; // method ptscotch; simpleCoeffs { n (4 1 1); delta 0.001; } hierarchicalCoeffs { n (2 1 1); delta 0.001; order xyz; } manualCoeffs { dataFile "cellDecomposition"; } - Mesh is split:
# decomposePar - If your simulation crashes or diverges in the early stage of computation, it can be caused by a rough intial guess. Therefore the potentialFoam is a good tool to initialize the computation
- Generate starting fields by potentialFoam run in parallel
# mpiexec -np 2 potentialFoam -noFunctionObjects -parallel - Option -noFunctionObjects switch off executing of functions defined in controlDict
- Run computation in parallel on background forwarding output to file log.simpleFoam
# mpiexec -np 2 simpleFoam -parallel > log.simpleFoam & - Parameter -np 2 means number of processes and must correspond with numberOfSubdomains in system/decomposeParDict
- Use reconstructPar utility and view results in paraview
# paraFoam 7.4
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