OpenFOAM logo
Open Source CFD Toolkit

mixedSmagorinsky.H File Reference


Detailed Description

View mixedSmagorinsky.H
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 2 of the License, or (at your
option) any later version.

OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with OpenFOAM; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Description
      The mixed Isochoric Smagorinsky Model
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      The mixed model is a linear combination of an eddy viscosity model
      (Smagorinsky) with a scale similarity model.  Hence

          B = (L + C) + R = (F(v*v) - F(v)*F(v)) + R

      The algebraic eddy viscosity SGS model is founded on the assumption
      that local equilibrium prevails, hence

          R = 2/3*k*I - 2*nuEff*dev(D)

      where

          k = cI*delta^2*||D||^2
          nuEff = ck*sqrt(k)*delta + nu

      The Leonard and cross contributions are incorporated
      by adding,

         + div(((filter(U*U) - filter(U)*filter(U)) -
           0.333*I*tr(filter(U*U) - filter(U)*filter(U))))
         + div((filter(U*epsilon) - filter(U)*filter(epsilon)))

      to the rhs. of the equations.

Source files

Definition in file mixedSmagorinsky.H.

Go to the source code of this file.

Namespaces

namespace  Foam
namespace  Foam::LESmodels

Classes

class  mixedSmagorinsky

For further information go to www.openfoam.org