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: snappyHexMesh: express small regions. Fixes #2379

Browse Source 
Extend selection of small cells to use absolute cell count
This commit is contained in:
mattijs
2022-02-24 09:41:21 +00:00
parent 5386dd56db
commit ff8518a89a
4 changed files with 18 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
etc/caseDicts/annotated/snappyHexMeshDict
View File

@ -480,6 +480,8 @@ castellatedMeshControls
// when generating meshes with faceZones as baffles or boundary // when generating meshes with faceZones as baffles or boundary
// faces. // faces.
//minCellFraction 0.001; //minCellFraction 0.001;
// Optional: same but in absolute number of cells. Default is 0.
//nMinCells 100;
} }
// Settings for the snapping. // Settings for the snapping.

1
src/mesh/snappyHexMesh/snappyHexMeshDriver/refinementParameters/refinementParameters.C
View File

@ -95,6 +95,7 @@ Foam::refinementParameters::refinementParameters
nErodeCellZone_(dict.getOrDefault<label>("nCellZoneErodeIter", 0)), nErodeCellZone_(dict.getOrDefault<label>("nCellZoneErodeIter", 0)),
nFilterIter_(dict.getOrDefault<label>("nFilterIter", 2)), nFilterIter_(dict.getOrDefault<label>("nFilterIter", 2)),
minCellFraction_(dict.getOrDefault<scalar>("minCellFraction", 0)), minCellFraction_(dict.getOrDefault<scalar>("minCellFraction", 0)),
nMinCells_(dict.getOrDefault<label>("nMinCells", 0)),
dryRun_(dryRun) dryRun_(dryRun)
{ {
point locationInMesh; point locationInMesh;

9
src/mesh/snappyHexMesh/snappyHexMeshDriver/refinementParameters/refinementParameters.H
View File

@ -115,6 +115,8 @@ class refinementParameters
const scalar minCellFraction_; const scalar minCellFraction_;
const label nMinCells_;
const bool dryRun_; const bool dryRun_;
@ -244,6 +246,13 @@ public:
return minCellFraction_; return minCellFraction_;
} }
//- When are disconnected regions small. Absolute number of cells
// in a zone or background. Default 0.
label nMinCells() const
{
return nMinCells_;
}
// Other // Other

11
src/mesh/snappyHexMesh/snappyHexMeshDriver/snappyRefineDriver.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
Copyright (C) 2011-2015 OpenFOAM Foundation Copyright (C) 2011-2015 OpenFOAM Foundation
Copyright (C) 2015-2021 OpenCFD Ltd. Copyright (C) 2015-2022 OpenCFD Ltd.
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
This file is part of OpenFOAM. This file is part of OpenFOAM.
@ -3209,21 +3209,22 @@ void Foam::snappyRefineDriver::deleteSmallRegions
forAll(nCellsPerRegion, regioni) forAll(nCellsPerRegion, regioni)
{ {
const label zonei = regionToZone[regioni]; const label zonei = regionToZone[regioni];
label& nRegionCells = nCellsPerRegion[regioni];
if if
( (
nCellsPerRegion[regioni] nRegionCells < refineParams.minCellFraction()*nCellsPerZone[zonei]
< refineParams.minCellFraction()*nCellsPerZone[zonei] || nRegionCells < refineParams.nMinCells()
) )
{ {
Info<< "Deleting region " << regioni Info<< "Deleting region " << regioni
<< " (size " << nCellsPerRegion[regioni] << " (size " << nRegionCells
<< ") of zone size " << nCellsPerZone[zonei] << ") of zone size " << nCellsPerZone[zonei]
<< endl; << endl;
// Mark region to be deleted. 0 size (= global) should never // Mark region to be deleted. 0 size (= global) should never
// occur. // occur.
nCellsPerRegion[regioni] = 0; nRegionCells = 0;
} }
} }