cubeRootVolDelta.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
     \\/     M anipulation  | Copyright (C) 2016 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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\*---------------------------------------------------------------------------*/
 
#include "cubeRootVolDelta.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
    defineTypeNameAndDebug(cubeRootVolDelta, 0);
    addToRunTimeSelectionTable(LESdelta, cubeRootVolDelta, dictionary);
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::LESModels::cubeRootVolDelta::calcDelta()
{
    const fvMesh& mesh = turbulenceModel_.mesh();
 
    label nD = mesh.nGeometricD();
 
    if (nD == 3)
    {
        delta_.internalField() = deltaCoeff_*pow(mesh.V(), 1.0/3.0);
    }
    else if (nD == 2)
    {
        WarningInFunction
            << "Case is 2D, LES is not strictly applicable\n"
            << endl;
 
        const Vector<label>& directions = mesh.geometricD();
 
        scalar thickness = 0.0;
        for (direction dir=0; dir<directions.nComponents; dir++)
        {
            if (directions[dir] == -1)
            {
                thickness = mesh.bounds().span()[dir];
                break;
            }
        }
 
        delta_.internalField() = deltaCoeff_*sqrt(mesh.V()/thickness);
    }
    else
    {
        FatalErrorInFunction
            << "Case is not 3D or 2D, LES is not applicable"
            << exit(FatalError);
    }
 
    // Handle coupled boundaries
    delta_.correctBoundaryConditions();
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::LESModels::cubeRootVolDelta::cubeRootVolDelta
(
    const word& name,
    const turbulenceModel& turbulence,
    const dictionary& dict
)
:
    LESdelta(name, turbulence),
    deltaCoeff_
    (
        dict.subDict(type() + "Coeffs").lookupOrDefault<scalar>("deltaCoeff", 1)
    )
{
    calcDelta();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::LESModels::cubeRootVolDelta::read(const dictionary& dict)
{
    dict.subDict(type() + "Coeffs").readIfPresent<scalar>
    (
        "deltaCoeff",
        deltaCoeff_
    );
 
    calcDelta();
}
 
 
void Foam::LESModels::cubeRootVolDelta::correct()
{
    if (turbulenceModel_.mesh().changing())
    {
        calcDelta();
    }
}
 
 
// ************************************************************************* //