Step 9: Solution Using the RNG $k$- $\epsilon$ Model

  Recalculate the solution using the RNG $k$- $\epsilon$ turbulence model.

1.   Enable the RNG $k$- $\epsilon$ turbulence model with the enhanced near-wall treatment.

Models Viscous Edit...

(a)   Select RNG in the k-epsilon Model list.

(b)   Enable Differential Viscosity Model and Swirl Dominated Flow in the RNG Options group box.

  The differential viscosity model and swirl modification can provide better accuracy for swirling flows such as the disk cavity.

For more information, see this section in the separate Theory Guide.

(c)   Retain Enhanced Wall Treatment as the Near-Wall Treatment.

(d)   Click OK to close the Viscous Model dialog box.

2.   Continue the calculation by requesting 200 iterations.

Run Calculation

  The solution converges after approximately 105 additional iterations.

3.   Save the case and data files ( disk-rng.cas.gz and disk-rng.dat.gz).

File $\rightarrow$ Write $\rightarrow$ Case & Data...