1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2008 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
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23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 \*---------------------------------------------------------------------------*/
27 #include "dynOneEqEddy.H"
28 #include "addToRunTimeSelectionTable.H"
30 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
34 namespace incompressible
39 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
41 defineTypeNameAndDebug(dynOneEqEddy, 0);
42 addToRunTimeSelectionTable(LESModel, dynOneEqEddy, dictionary);
44 // * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
46 dimensionedScalar dynOneEqEddy::ck(const volSymmTensorField& D) const
48 volScalarField KK = 0.5*(filter_(magSqr(U())) - magSqr(filter_(U())));
50 volSymmTensorField LL = dev(filter_(sqr(U())) - sqr(filter_(U())));
52 volSymmTensorField MM =
53 delta()*(filter_(sqrt(k_)*D) - 2*sqrt(KK + filter_(k_))*filter_(D));
55 dimensionedScalar MMMM = average(magSqr(MM));
57 if (MMMM.value() > VSMALL)
59 return average(LL && MM)/MMMM;
68 dimensionedScalar dynOneEqEddy::ce(const volSymmTensorField& D) const
70 volScalarField KK = 0.5*(filter_(magSqr(U())) - magSqr(filter_(U())));
73 pow(KK + filter_(k_), 1.5)/(2*delta()) - filter_(pow(k_, 1.5))/delta();
78 filter_(sqrt(k_)*magSqr(D))
79 - 2*sqrt(KK + filter_(k_))*magSqr(filter_(D))
82 dimensionedScalar mmmm = average(magSqr(mm));
84 if (mmmm.value() > VSMALL)
86 return average(ee*mm)/mmmm;
95 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
97 dynOneEqEddy::dynOneEqEddy
99 const volVectorField& U,
100 const surfaceScalarField& phi,
101 transportModel& transport
104 LESModel(typeName, U, phi, transport),
105 GenEddyVisc(U, phi, transport),
120 filterPtr_(LESfilter::New(U.mesh(), coeffDict())),
121 filter_(filterPtr_())
127 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
129 dynOneEqEddy::~dynOneEqEddy()
133 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
135 void dynOneEqEddy::correct(const tmp<volTensorField>& gradU)
137 GenEddyVisc::correct(gradU);
139 volSymmTensorField D = symm(gradU);
141 volScalarField P = 2.0*nuSgs_*magSqr(D);
146 + fvm::div(phi(), k_)
147 - fvm::laplacian(DkEff(), k_)
150 - fvm::Sp(ce(D)*sqrt(k_)/delta(), k_)
155 nuSgs_ = ck(D)*sqrt(k_)*delta();
156 nuSgs_.correctBoundaryConditions();
160 bool dynOneEqEddy::read()
162 if (GenEddyVisc::read())
164 filter_.read(coeffDict());
175 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
177 } // End namespace LESModels
178 } // End namespace incompressible
179 } // End namespace Foam
181 // ************************************************************************* //