DecomposeParDictの中身
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decomposeParDictのサンプルは、 <OpenFOAMのインストールフォルダ>/applications/utilities/parallelProcessing/decomposePar/decomposeParDict に置いてある。
各パラメータについてはコメントで説明されている。
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1806 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
note "mesh decomposition control dictionary";
object decomposeParDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
//- The total number of domains (mandatory)
numberOfSubdomains 256;
//- The decomposition method (mandatory)
method scotch;
// method hierarchical;
// method simple;
// method metis;
// method manual;
// method multiLevel;
// method structured; // does 2D decomposition of structured mesh
//- Optional region-wise decomposition.
// Can specify a different method.
// The number of subdomains can be less than the top-level numberOfSubdomains.
regions
{
water
{
numberOfSubdomains 128;
method metis;
}
".*solid"
{
numberOfSubdomains 4;
method metis;
}
heater
{
numberOfSubdomains 1;
method none;
}
}
// Coefficients for the decomposition method are either as a
// general "coeffs" dictionary or method-specific "<method>Coeffs".
// For multiLevel, using multiLevelCoeffs only.
multiLevelCoeffs
{
// multiLevel decomposition methods to apply in turn.
// This is like hierarchical but fully general
// - every method can be used at every level.
// Only sub-dictionaries containing the keyword "method" are used.
//
level0
{
numberOfSubdomains 16;
method scotch;
}
level1
{
numberOfSubdomains 2;
method scotch;
coeffs
{
n (2 1 1);
delta 0.001;
}
}
level2
{
numberOfSubdomains 8;
// method simple;
method scotch;
}
}
multiLevelCoeffs
{
// Compact multiLevel specification, activated by the presence of the
// keywords "method" and "domains"
method scotch;
domains (16 2 8);
//// Or with implicit '16' for the first level with numberOfSubdomains=256
//domains (2 8);
}
// Other example coefficients
simpleCoeffs
{
n (2 1 1);
// delta 0.001; //< default value = 0.001
}
hierarchicalCoeffs
{
n (1 2 1);
// delta 0.001; //< default value = 0.001
// order xyz; //< default order = xyz
}
metisCoeffs
{
/*
processorWeights
(
1
1
1
1
);
*/
}
scotchCoeffs
{
//processorWeights
//(
// 1
// 1
// 1
// 1
//);
//writeGraph true;
//strategy "b";
}
manualCoeffs
{
dataFile "decompositionData";
}
structuredCoeffs
{
// Patches to do 2D decomposition on. Structured mesh only; cells have
// to be in 'columns' on top of patches.
patches (movingWall);
// Method to use on the 2D subset
method scotch;
}
//- Use the volScalarField named here as a weight for each cell in the
// decomposition. For example, use a particle population field to decompose
// for a balanced number of particles in a lagrangian simulation.
// weightField dsmcRhoNMean;
//// Is the case distributed? Note: command-line argument -roots takes
//// precedence
//distributed yes;
//
//// Per slave (so nProcs-1 entries) the directory above the case.
//roots
//(
// "/tmp"
// "/tmp"
//);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Decomposition constraints
//constraints
//{
// preserveBaffles
// {
// //- Keep owner and neighbour of baffles on same processor (i.e.
// // keep it detectable as a baffle). Baffles are two boundary face
// // sharing the same points
// type preserveBaffles;
// }
// preserveFaceZones
// {
// //- Keep owner and neighbour on same processor for faces in zones
// type preserveFaceZones;
// zones (".*");
// }
// preservePatches
// {
// //- Keep owner and neighbour on same processor for faces in patches
// // (only makes sense for cyclic patches. Not suitable for e.g.
// // cyclicAMI since these are not coupled on the patch level. Use
// // singleProcessorFaceSets for those)
// type preservePatches;
// patches (".*");
// }
// singleProcessorFaceSets
// {
// //- Keep all of faceSet on a single processor. This puts all cells
// // connected with a point, edge or face on the same processor.
// // (just having face connected cells might not guarantee a balanced
// // decomposition)
// // The processor can be -1 (the decompositionMethod chooses the
// // processor for a good load balance) or explicitly provided (upsets
// // balance)
// type singleProcessorFaceSets;
// singleProcessorFaceSets ((f1 -1));
// }
// refinementHistory
// {
// //- Decompose cells such that all cell originating from single cell
// // end up on same processor
// type refinementHistory;
// }
//}
// Deprecated form of specifying decomposition constraints:
//- Keep owner and neighbour on same processor for faces in zones:
// preserveFaceZones (heater solid1 solid3);
//- Keep owner and neighbour on same processor for faces in patches:
// (makes sense only for cyclic patches. Not suitable for e.g. cyclicAMI
// since these are not coupled on the patch level. Use
// singleProcessorFaceSets for those)
//preservePatches (cyclic_half0 cyclic_half1);
//- Keep all of faceSet on a single processor. This puts all cells
// connected with a point, edge or face on the same processor.
// (just having face connected cells might not guarantee a balanced
// decomposition)
// The processor can be -1 (the decompositionMethod chooses the processor
// for a good load balance) or explicitly provided (upsets balance).
//singleProcessorFaceSets ((f0 -1));
//- Keep owner and neighbour of baffles on same processor (i.e. keep it
// detectable as a baffle). Baffles are two boundary face sharing the
// same points.
//preserveBaffles true;
// ************************************************************************* //