zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ENH: Do a weighted balance before refinement and layer addition.

Browse Source 
Have weight=7 on cells to be refined and balance. Then after refinement
there will be perfect balancing. Similar for layer addition.
This commit is contained in:
mattijs
2010-02-03 06:18:30 +00:00
parent 953030879e
commit 36346ec1a2
11 changed files with 262 additions and 121 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C
View File

@ -434,6 +434,19 @@ int main(int argc, char *argv[])
// Layer addition parameters
layerParameters layerParams(layerDict, mesh.boundaryMesh());
//!!! Temporary hack to get access to maxLocalCells
bool preBalance;
{
refinementParameters refineParams(refineDict);
preBalance = returnReduce
(
(mesh.nCells() >= refineParams.maxLocalCells()),
orOp<bool>()
);
}
if (!overwrite)
{
const_cast<Time&>(mesh.time())++;
@ -444,6 +457,7 @@ int main(int argc, char *argv[])
layerDict,
motionDict,
layerParams,
preBalance,
decomposer,
distributor
);

17
applications/utilities/mesh/generation/snappyHexMesh/snappyHexMeshDict
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class dictionary;
object autoHexMeshDict;
object snappyHexMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@ -40,7 +40,7 @@ geometry
{
type triSurfaceMesh;
//tolerance 1E-6; // optional:non-default tolerance on intersections
//tolerance 1E-5; // optional:non-default tolerance on intersections
//maxTreeDepth 10; // optional:depth of octree. Decrease only in case
// of memory limitations.
@ -71,9 +71,9 @@ castellatedMeshControls
// Refinement parameters
// ~~~~~~~~~~~~~~~~~~~~~
// While refining maximum number of cells per processor. This is basically
// the number of cells that fit on a processor. If you choose this too small
// it will do just more refinement iterations to obtain a similar mesh.
// If local number of cells is >= maxLocalCells on any processor
// switches from from refinement followed by balancing
// (current method) to (weighted) balancing before refinement.
maxLocalCells 1000000;
// Overall cell limit (approximately). Refinement will stop immediately
@ -89,6 +89,13 @@ castellatedMeshControls
// (unless the number of cells to refine is 0)
minRefinementCells 0;
// Allow a certain level of imbalance during refining
// (since balancing is quite expensive)
// Expressed as fraction of perfect balance (= overall number of cells /
// nProcs). 0=balance always.
maxLoadUnbalance 0.10;
// Number of buffer layers between different levels.
// 1 means normal 2:1 refinement restriction, larger means slower
// refinement.