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Localised Dynamic One Equation Eddy Viscosity Model ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Eddy viscosity SGS model using a modeled balance equation to simulate the behaviour of k, hence
d/dt(k) + div(U*k) - div(nuSgs*grad(k)) = -B*L - ce*rho*k^3/2/delta
and
B = 2/3*k*I - 2*nuEff*dev(D)
where
nuEff = cD*delta^2*||D|| + nu
A dynamic procedure is here applied to evaluate ck and ce
ck=<L.M>/<M.M>
and
ce=<e*m>/<m*m>
where
K = 0.5*(F(U.U) - F(U).F(U)) L = (F(U*U) - F(U)*F(U) - 0.33*K*I) M = delta*(F(sqrt(k)*D) - 2*sqrt(K + filter(k))*F(D)) m = pow(K + F(k), 3.0/2.0)/(2*delta) - F(pow(k, 3.0/2.0))/delta e = 2*delta*ck*(F(sqrt(k)*(D && D)) - 2*sqrt(K + F(k))*(F(D) && F(D)))/
Definition in file locDynOneEqEddy.H.
Go to the source code of this file.
Namespaces | |
namespace | Foam |
namespace | Foam::LESmodels |
Classes | |
class | locDynOneEqEddy |