## 12.8.2 Realizable - RANS Model

This RANS model is similar to the Realizable - model discussed in Section  12.4.3, with the exception of the dissipation term in the equation. In the DES model, the Realizable - RANS dissipation term is modified such that:

 (12.8-2)

where
 (12.8-3) (12.8-4) (12.8-5)

where is a calibration constant used in the DES model and has a value of 0.61 and is the maximum local grid spacing ( ).

For the case where , you will obtain an expression for the dissipation of the formulation for the Realizable - model (Section  12.4.3):

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