# Smagorinsky model

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 June 22, 2006, 06:29 I ran a LES calculation using #1 New Member   Sylvain Join Date: Mar 2009 Location: Surrey, England Posts: 5 Rep Power: 17 I ran a LES calculation using the Smagorinsky model and I was suprised to see that no post data files existed for k. I had a look at the code and apparently in this turbulent model the subgrid scale turbulent energy is of course calculated and normally returned. I know some data can be added using PostProcessing from FoamUtilities but I could not figure out where k was. If someone knows how to get it? Moreover from the code I doubt about the function which returns k in Smagorinsky.H: the square of delta and deviatoric component of D. Description
The Isochoric Smagorinsky Model      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~      Algebraic eddy viscosity SGS model founded on the assumption that      local equilibrium prevails, hence            B = 2/3*k*I - 2*nuEff*dev(D)        where            D = symm(grad(U));          k = (2*ck/ce)*delta^2*||D||^2          nuSgs = ck*sqrt(k)*delta          nuEff = nuSgs + nu
SourceFiles Smagorinsky.C Farther in Smagorinsky.H: //- Return SGS kinetic energy // calculated from the given velocity gradient tmp k(const tmp& gradU) const { return (2.0*ck_/ce_)*sqr(delta())*magSqr(dev(symm(gradU))); } If someone could help me telling me what he thinks about it? Perhaps I did not analyse the code correctly? Thanks

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