12.17.1 Custom Field Functions for Turbulence

In addition to the quantities listed in Section  12.17, you can define your own turbulence quantities using the Custom Field Function Calculator dialog box.

Define $\rightarrow$ Custom Field Functions...

The following functions may be useful:

• the ratio of production of $k$ to its dissipation ( $G_k / \rho \epsilon$)

• the ratio of the mean flow to turbulent time scale, $\eta$ ( $\equiv S k/\epsilon$)

• the Reynolds stresses derived from the Boussinesq formula (e.g., $-\overline{uv} = \nu_t \frac{\partial u}{\partial y}$)