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ENH: snappyHexMesh: directional refinememt.

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Basic directional refinement:
- only for coordinate aligned meshes
- only for refinementRegions
See the mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement
tutorial.
This commit is contained in:
mattijs
2018-05-21 16:51:57 +01:00
parent 430367b25a
commit cb1cd96b04
11 changed files with 24688 additions and 2 deletions
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3
src/mesh/snappyHexMesh/snappyHexMeshDriver/snappyRefineDriver.C
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@ -1684,8 +1684,7 @@ Foam::label Foam::snappyRefineDriver::directionalShellRefine
const_cast<Time&>(mesh.time())++;
}
PackedBoolList isRefineCell(mesh.nCells());
isRefineCell.set(cellsToRefine);
const bitSet isRefineCell(mesh.nCells(), cellsToRefine);
autoPtr<mapPolyMesh> map
(

12
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/Allrun Executable file
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@ -0,0 +1,12 @@
#!/bin/sh
cd ${0%/*} || exit 1 # Run from this directory
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions
application="$(getApplication)"
runApplication blockMesh
runApplication snappyHexMesh
#------------------------------------------------------------------------------

47
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/constant/thermophysicalProperties Normal file
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@ -0,0 +1,47 @@
/*--------------------------------*- 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;
location "constant";
object thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
thermoType
{
type hePsiThermo;
mixture pureMixture;
transport const;
thermo hConst;
equationOfState perfectGas;
specie specie;
energy sensibleInternalEnergy;
}
mixture // air at room temperature (293 K)
{
specie
{
molWeight 28.9;
}
thermodynamics
{
Cp 1005;
Hf 0;
}
transport
{
mu 1.82e-05;
Pr 0.71;
}
}
// ************************************************************************* //

23992
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/constant/triSurface/NACA0012.obj Normal file
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26
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/constant/turbulenceProperties Normal file
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@ -0,0 +1,26 @@
/*--------------------------------*- 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 turbulenceProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
simulationType RAS;
RAS
{
RASModel kOmegaSST;
turbulence on;
printCoeffs on;
}
// ************************************************************************* //

85
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/blockMeshDict Normal file
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@ -0,0 +1,85 @@
/*--------------------------------*- 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 blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
scale 1;
vertices
(
(-0.5 -0.1 -0.5)
( 2 -0.1 -0.5)
( 2 0.1 -0.5)
(-0.5 0.1 -0.5)
(-0.5 -0.1 0.5)
( 2 -0.1 0.5)
( 2 0.1 0.5)
(-0.5 0.1 0.5)
);
blocks
(
hex (0 1 2 3 4 5 6 7) (25 2 10) simpleGrading (1 1 1)
);
edges
(
);
boundary
(
frontAndBack
{
type patch;
faces
(
(3 7 6 2)
(1 5 4 0)
);
}
inlet
{
type patch;
faces
(
(0 4 7 3)
);
}
outlet
{
type patch;
faces
(
(2 6 5 1)
);
}
lowerWall
{
type wall;
faces
(
(0 3 2 1)
);
}
upperWall
{
type patch;
faces
(
(4 5 6 7)
);
}
);
// ************************************************************************* //

48
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/controlDict Normal file
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@ -0,0 +1,48 @@
/*--------------------------------*- 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 controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
application snappyHexMesh;
startFrom startTime;
startTime 0;
stopAt endTime;
endTime 1000;
deltaT 1;
writeControl timeStep;
writeInterval 50;
purgeWrite 0;
writeFormat ascii;
writePrecision 8;
writeCompression off;
timeFormat general;
timePrecision 6;
runTimeModifiable true;
// ************************************************************************* //

74
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/fvSchemes Normal file
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@ -0,0 +1,74 @@
/*--------------------------------*- 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 fvSchemes;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
ddtSchemes
{
default steadyState;
}
gradSchemes
{
default Gauss linear;
limited cellLimited Gauss linear 1;
grad(U) $limited;
grad(k) $limited;
grad(omega) $limited;
}
divSchemes
{
default none;
div(phi,U) bounded Gauss linearUpwind limited;
turbulence bounded Gauss upwind;
energy bounded Gauss linearUpwind limited;
div(phi,k) $turbulence;
div(phi,omega) $turbulence;
div(phi,e) $energy;
div(phi,K) $energy;
div(phi,Ekp) $energy;
div(phid,p) Gauss upwind;
div((phi|interpolate(rho)),p) bounded Gauss upwind;
div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
}
laplacianSchemes
{
default Gauss linear corrected;
}
interpolationSchemes
{
default linear;
}
snGradSchemes
{
default corrected;
}
wallDist
{
method meshWave;
}
// ************************************************************************* //

65
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/fvSolution Normal file
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@ -0,0 +1,65 @@
/*--------------------------------*- 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 fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
solvers
{
p
{
solver GAMG;
smoother GaussSeidel;
tolerance 1e-6;
relTol 0.01;
}
"(U|k|omega|e)"
{
solver PBiCGStab;
preconditioner DILU;
tolerance 1e-6;
relTol 0.1;
}
}
SIMPLE
{
residualControl
{
p 1e-4;
U 1e-4;
"(k|omega|e)" 1e-4;
}
nNonOrthogonalCorrectors 0;
pMinFactor 0.1;
pMaxFactor 2;
}
relaxationFactors
{
fields
{
p 0.7;
rho 0.01;
}
equations
{
U 0.3;
e 0.7;
"(k|omega)" 0.7;
}
}
// ************************************************************************* //

21
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/meshQualityDict Normal file
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@ -0,0 +1,21 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: plus |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object meshQualityDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Include defaults parameters from master dictionary
#includeEtc "caseDicts/meshQualityDict"
// ************************************************************************* //

317
tutorials/mesh/snappyHexMesh/aerofoilNACA0012_directionalRefinement/system/snappyHexMeshDict Normal file
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@ -0,0 +1,317 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: plus |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object snappyHexMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Which of the steps to run
castellatedMesh true;
snap true;
addLayers false;
// Geometry. Definition of all surfaces. All surfaces are of class
// searchableSurface.
// Surfaces are used
// - to specify refinement for any mesh cell intersecting it
// - to specify refinement for any mesh cell inside/outside/near
// - to 'snap' the mesh boundary to the surface
geometry
{
NACA0012
{
type triSurfaceMesh;
file "NACA0012.obj";
}
wake
{
type searchableBox;
min (0.8 -0.1 -0.1);
max (2.0 0.1 0.1);
}
};
// Settings for the castellatedMesh generation.
castellatedMeshControls
{
// Refinement parameters
// ~~~~~~~~~~~~~~~~~~~~~
// 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 100000;
// Overall cell limit (approximately). Refinement will stop immediately
// upon reaching this number so a refinement level might not complete.
// Note that this is the number of cells before removing the part which
// is not 'visible' from the keepPoint. The final number of cells might
// actually be a lot less.
maxGlobalCells 2000000;
// The surface refinement loop might spend lots of iterations refining just
// a few cells. This setting will cause refinement to stop
// if <= minimumRefine are selected for refinement. Note: it will at
// least do one iteration (unless the number of cells to refine is 0)
minRefinementCells 100;
// Number of buffer layers between different levels.
// 1 means normal 2:1 refinement restriction, larger means slower
// refinement.
nCellsBetweenLevels 1;
// Explicit feature edge refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies a level for any cell intersected by its edges.
// This is a featureEdgeMesh, read from constant/triSurface for now.
features
(
);
// Surface based refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies two levels for every surface. The first is the minimum level,
// every cell intersecting a surface gets refined up to the minimum level.
// The second level is the maximum level. Cells that 'see' multiple
// intersections where the intersections make an
// angle > resolveFeatureAngle get refined up to the maximum level.
refinementSurfaces
{
NACA0012
{
// Surface-wise min and max refinement level
level (2 2);
// Optional specification of patch type (default is wall). No
// constraint types (cyclic, symmetry) etc. are allowed.
patchInfo
{
type wall;
}
}
}
// Resolve sharp angles on fridges
resolveFeatureAngle 60;
// Region-wise refinement
// ~~~~~~~~~~~~~~~~~~~~~~
// Specifies refinement level for cells in relation to a surface. One of
// three modes
// - distance. 'levels' specifies per distance to the surface the
// wanted refinement level. The distances need to be specified in
// descending order.
// - inside. 'levels' is only one entry and only the level is used. All
// cells inside the surface get refined up to the level. The surface
// needs to be closed for this to be possible.
// - outside. Same but cells outside.
refinementRegions
{
wake
{
mode inside;
// Disable uniform refinement
levels ((10000 0));
// Optional: directional refinement
// (after all other refinement). Directional refinement
// for all cells according to 'mode' ('inside' or 'outside';
// 'distance' not supported) and within certain range. E.g.
// - for all cells with level 0-1
// - do one split in y and z direction. Note:the resulting mesh is
// no longer compatible with e.g. dynamic
// refinement/unrefinement.
levelIncrement (0 1 (0 1 1));
}
}
// Mesh selection
// ~~~~~~~~~~~~~~
// After refinement patches get added for all refinementSurfaces and
// all cells intersecting the surfaces get put into these patches. The
// section reachable from the locationInMesh is kept.
// NOTE: This point should never be on a face, always inside a cell, even
// after refinement.
locationInMesh (-0.499 -0.0999 -0.499);
// Whether any faceZones (as specified in the refinementSurfaces)
// are only on the boundary of corresponding cellZones or also allow
// free-standing zone faces. Not used if there are no faceZones.
allowFreeStandingZoneFaces true;
}
// Settings for the snapping.
snapControls
{
//- Number of patch smoothing iterations before finding correspondence
// to surface
nSmoothPatch 3;
//- Relative distance for points to be attracted by surface feature point
// or edge. True distance is this factor times local
// maximum edge length.
tolerance 2.0;
//- Number of mesh displacement relaxation iterations.
nSolveIter 30;
//- Maximum number of snapping relaxation iterations. Should stop
// before upon reaching a correct mesh.
nRelaxIter 5;
// Feature snapping
//- Number of feature edge snapping iterations.
// Leave out altogether to disable.
nFeatureSnapIter 10;
//- Detect (geometric) features by sampling the surface (default=false)
implicitFeatureSnap true;
//- Use castellatedMeshControls::features (default = true)
explicitFeatureSnap false;
}
// Settings for the layer addition.
addLayersControls
{
// Are the thickness parameters below relative to the undistorted
// size of the refined cell outside layer (true) or absolute sizes (false).
relativeSizes true;
// Per final patch (so not geometry!) the layer information
layers
{
"two.*"
{
nSurfaceLayers 3;
}
ground
{
nSurfaceLayers 3;
}
igloo
{
nSurfaceLayers 1;
}
}
// Expansion factor for layer mesh
expansionRatio 1.0;
// Wanted thickness of final added cell layer. If multiple layers
// is the thickness of the layer furthest away from the wall.
// Relative to undistorted size of cell outside layer.
// See relativeSizes parameter.
finalLayerThickness 0.5;
// Minimum thickness of cell layer. If for any reason layer
// cannot be above minThickness do not add layer.
// Relative to undistorted size of cell outside layer.
// See relativeSizes parameter.
minThickness 0.05;
// If points get not extruded do nGrow layers of connected faces that are
// also not grown. This helps convergence of the layer addition process
// close to features.
// Note: changed(corrected) w.r.t 17x! (didn't do anything in 17x)
nGrow 0;
// Advanced settings
// When not to extrude surface. 0 is flat surface, 90 is when two faces
// are perpendicular
featureAngle 180;
// Maximum number of snapping relaxation iterations. Should stop
// before upon reaching a correct mesh.
nRelaxIter 5;
// Stop layer growth on highly warped cells
maxFaceThicknessRatio 0.5;
// Smooth layer thickness over surface patches
nSmoothThickness 10;
//- Use displacementMotionSolver to shrink mesh
meshShrinker displacementMotionSolver;
//- Use laplacian for shrinking
solver displacementLaplacian;
displacementLaplacianCoeffs
{
diffusivity quadratic inverseDistance ("two.*" igloo);
}
// Create buffer region for new layer terminations
nBufferCellsNoExtrude -1; //0;
// Overall max number of layer addition iterations. The mesher will exit
// if it reaches this number of iterations; possibly with an illegal
// mesh.
nLayerIter 50;
}
// Generic mesh quality settings. At any undoable phase these determine
// where to undo.
meshQualityControls
{
#include "meshQualityDict"
// Advanced
//- Number of error distribution iterations
nSmoothScale 4;
//- Amount to scale back displacement at error points
errorReduction 0.75;
}
// Advanced
// Merge tolerance. Is fraction of overall bounding box of initial mesh.
// Note: the write tolerance needs to be higher than this.
mergeTolerance 1e-6;
//writeFlags (scalarLevels);
// ************************************************************************* //