The open source CFD toolbox

Note
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# Properties

• Incompressible only

# Model equations

The turbulence kinetic energy equation is given by:

$\Ddt{k} = \div \left(D_k \grad k \right) + G - \epsilon$

and the dissipation rate by:

$\Ddt{\epsilon} = \div \left( D_{\epsilon} \grad \epsilon \right) + C_1 G \frac{\epsilon}{k} - C_2 \frac{\epsilon^2}{k}$

The turbulence generation, $$G$$ is given by:

$G = \left[\nu_t \left( \grad \u + \left(\grad \u\right)^T \right) - \tensor{\tau}_{nl}\right] \colon \grad \u$

where $$\tensor{\tau}_{nl}$$ is the non-linear stress.

# Usage

The model is specified using:

RAS
{
turbulence      on;
}


# Further information

Source code:

Reference:

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