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The Mixed Isochoric Smagorinsky Model ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The mixed model is a linear combination of an eddy viscosity model with a scale similarity model.
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*rho*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. This version implements filtering to evaluate the coefficients in the model.
Definition in file dynMixedSmagorinsky.H.
Go to the source code of this file.
Namespaces | |
namespace | Foam |
namespace | Foam::LESmodels |
Classes | |
class | dynMixedSmagorinsky |