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Lien-Leschziner

Properties​

  • Incompressible only
  • Two-equation model

Model equations​

The turbulence kinetic energy equation is given by:

DDt(k)=∇ ∙ (Dk∇k)+G−ϵ \Ddt{k} = \div \left( D_k \grad k \right) + G - \epsilon

and the turbulence dissipation rate equation by:

DDt(ϵ)=∇ ∙ (Dϵ∇ϵ)+Cϵ1Gϵ/k−Cϵ2f2ϵ2/k+E \Ddt{\epsilon} = \div \left( D_\epsilon \grad \epsilon \right) + C_{\epsilon 1} G \epsilon/k - C_{\epsilon 2} f_2 \epsilon^2/k + E

Default model coefficients​

Usage​

The model is specified using:

RAS
{
    turbulence      on;
    RASModel        LienLeschziner;
}

Further information​

Source code:

References:

  • Standard model: Lien and Leschziner 43