Properties🔗
Model equations🔗
The turbulence kinetic energy equation is given by:
\[\Ddt{\rho k} = \div \left(\rho D_k \grad k\right) + \rho G - \frac{2}{3}\rho \left(\div \u\right) k - \rho \epsilon + S_k\]and the dissipation rate by:
\[\Ddt{\rho \epsilon} = \div \left(\rho D_\epsilon \grad \epsilon \right) + C_1 \rho \mag{\tensor{S}} \epsilon - C_2 \rho \frac{\epsilon^2}{k + \left(\nu \epsilon\right)^{0.5}} + S_\epsilon\]The turbulence viscosity is calculated using:
\[\nu_t = C_{\mu} \frac{k^2}{\epsilon}\]where the \(C_{\mu}\) is given by:
\[C_{\mu} = \frac{1}{A_0 + A_s U^{*} \frac{k}{\epsilon}}\]Default model coefficients🔗
Initialisation🔗
Usage🔗
The model is specified using:
RAS
{
turbulence on;
RASModel realizableKE;
}
Boundary conditions🔗
Walls
Further information🔗
Source code:
References:
- Shih et al. [62]