1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 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 void dynOneEqEddy::updateSubGridScaleFields(const volSymmTensorField& D)
48 nuSgs_ = ck(D)*sqrt(k_)*delta();
49 nuSgs_.correctBoundaryConditions();
53 dimensionedScalar dynOneEqEddy::ck(const volSymmTensorField& D) const
55 volScalarField KK = 0.5*(filter_(magSqr(U())) - magSqr(filter_(U())));
57 volSymmTensorField LL = dev(filter_(sqr(U())) - sqr(filter_(U())));
59 volSymmTensorField MM =
60 delta()*(filter_(sqrt(k_)*D) - 2*sqrt(KK + filter_(k_))*filter_(D));
62 dimensionedScalar MMMM = average(magSqr(MM));
64 if (MMMM.value() > VSMALL)
66 return average(LL && MM)/MMMM;
75 dimensionedScalar dynOneEqEddy::ce(const volSymmTensorField& D) const
77 volScalarField KK = 0.5*(filter_(magSqr(U())) - magSqr(filter_(U())));
80 pow(KK + filter_(k_), 1.5)/(2*delta()) - filter_(pow(k_, 1.5))/delta();
85 filter_(sqrt(k_)*magSqr(D))
86 - 2*sqrt(KK + filter_(k_))*magSqr(filter_(D))
89 dimensionedScalar mmmm = average(magSqr(mm));
91 if (mmmm.value() > VSMALL)
93 return average(ee*mm)/mmmm;
102 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
104 dynOneEqEddy::dynOneEqEddy
106 const volVectorField& U,
107 const surfaceScalarField& phi,
108 transportModel& transport
111 LESModel(typeName, U, phi, transport),
112 GenEddyVisc(U, phi, transport),
127 filterPtr_(LESfilter::New(U.mesh(), coeffDict())),
128 filter_(filterPtr_())
130 updateSubGridScaleFields(symm(fvc::grad(U)));
136 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
138 void dynOneEqEddy::correct(const tmp<volTensorField>& gradU)
140 GenEddyVisc::correct(gradU);
142 volSymmTensorField D = symm(gradU);
144 volScalarField P = 2.0*nuSgs_*magSqr(D);
149 + fvm::div(phi(), k_)
150 - fvm::laplacian(DkEff(), k_)
153 - fvm::Sp(ce(D)*sqrt(k_)/delta(), k_)
161 updateSubGridScaleFields(D);
165 bool dynOneEqEddy::read()
167 if (GenEddyVisc::read())
169 filter_.read(coeffDict());
180 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
182 } // End namespace LESModels
183 } // End namespace incompressible
184 } // End namespace Foam
186 // ************************************************************************* //