New LES delta: longest cell edge magnitude
This commit is contained in:
Hrvoje Jasak
parent
6b2409a7fc
commit
a471c91e62
2 changed files with 270 additions and 0 deletions
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright held by original author
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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\*---------------------------------------------------------------------------*/
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#include "maxEdgeLengthDelta.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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defineTypeNameAndDebug(maxEdgeLengthDelta, 0);
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addToRunTimeSelectionTable(LESdelta, maxEdgeLengthDelta, dictionary);
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// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
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void maxEdgeLengthDelta::calcDelta()
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{
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label nD = mesh().nGeometricD();
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const cellList& cells = mesh().cells();
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const faceList& faces = mesh().faces();
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const pointField& points = mesh().points();
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scalarField& d = delta_.internalField();
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// Initialise d to a large number
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d = 0;
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if (nD == 3)
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{
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forAll (cells, cellI)
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{
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edgeList ce = cells[cellI].edges(faces);
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forAll (ce, ceI)
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{
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d[cellI] = Foam::max(d[cellI], ce[ceI].mag(points));
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}
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}
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}
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else if (nD == 2)
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{
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WarningIn("maxEdgeLengthDelta::calcDelta()")
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<< "Case is 2D, LES is not strictly applicable\n"
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<< endl;
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// Find the dead direction
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const Vector<label>& directions = mesh().geometricD();
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vector deadDir = vector::zero;
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for (direction dir = 0; dir < directions.nComponents; dir++)
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{
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if (directions[dir] == -1)
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{
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deadDir[dir] = 1;
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break;
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}
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}
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forAll (cells, cellI)
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{
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edgeList ce = cells[cellI].edges(faces);
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forAll (ce, ceI)
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{
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// Calculate edge magnitude and unit vector
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scalar magE = ce[ceI].mag(points);
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vector eN = ce[ceI].vec(points)/magE;
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// Filter the edges in the dead direction: the dot-product
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// of eN and deadDir should be 1, but in 2-D checking
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// can be relaxed. HJ, 8/Dec/2010
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if (mag(eN & deadDir) < 0.9)
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{
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d[cellI] = Foam::max(d[cellI], magE);
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}
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}
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}
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}
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else
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{
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FatalErrorIn("maxEdgeLengthDelta::calcDelta()")
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<< "Case is not 3D or 2D, LES is not applicable"
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<< exit(FatalError);
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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maxEdgeLengthDelta::maxEdgeLengthDelta
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(
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const word& name,
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const fvMesh& mesh,
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const dictionary& dd
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)
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:
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LESdelta(name, mesh),
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deltaCoeff_(readScalar(dd.subDict(type() + "Coeffs").lookup("deltaCoeff")))
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{
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calcDelta();
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void maxEdgeLengthDelta::read(const dictionary& dd)
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{
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dd.subDict(type() + "Coeffs").lookup("deltaCoeff") >> deltaCoeff_;
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calcDelta();
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}
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void maxEdgeLengthDelta::correct()
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{
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if (mesh_.changing())
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{
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calcDelta();
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}
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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@ -0,0 +1,113 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright held by original author
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Class
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Foam::maxEdgeLengthDelta
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Description
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Maximum cell edge length delta used in LES models.
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SourceFiles
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maxEdgeLengthDelta.C
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\*---------------------------------------------------------------------------*/
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#ifndef maxEdgeLengthDelta_H
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#define maxEdgeLengthDelta_H
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#include "LESdelta.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Class maxEdgeLengthDelta Declaration
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\*---------------------------------------------------------------------------*/
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class maxEdgeLengthDelta
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public LESdelta
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{
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// Private data
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scalar deltaCoeff_;
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// Private Member Functions
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//- Disallow default bitwise copy construct
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maxEdgeLengthDelta(const maxEdgeLengthDelta&);
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//- Disallow default bitwise assignment
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void operator=(const maxEdgeLengthDelta&);
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// Calculate the delta values
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void calcDelta();
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public:
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//- Runtime type information
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TypeName("maxEdgeLength");
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// Constructors
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//- Construct from name, mesh and IOdictionary
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maxEdgeLengthDelta
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(
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const word& name,
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const fvMesh& mesh,
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const dictionary&
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);
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// Destructor
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virtual ~maxEdgeLengthDelta()
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{}
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// Member Functions
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//- Read the LESdelta dictionary
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void read(const dictionary&);
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// Correct values
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void correct();
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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