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TWiki> Main Web>TWikiUsers>NeilAshton>EBRSMDDES (2010-10-27, NeilAshton)

TWiki> Main Web>TWikiUsers>NeilAshton>EBRSMDDES (2010-10-27, NeilAshton)

This page contains the equations necessary for the implementation of the EBRSM - DDES model into Code Saturne.

Spalart, P.R. et al. A New Version of Detached-eddy Simulation, Resistant to Ambiguous Grid Densities. Theoretical and Computational Fluid Dynamics 20, 181-195(2006).

Manceau R et al. Elliptic Blending model: A new near-wall Reynolds-stress turbulence closure. Physics of Fluids, 14, 744-754(2001)

The dissipation term of the equations becomes:

The length scale used in a DDES formulation is a switch between the RANS length scale and a LES length scale formulation:

The LES Length scale is:

The RANS length scale is defined as:

Where is:

The function is:

Where, and is the distance to the wall

- include and define the index values , IDDES which turns off the change in dissipation transport equation if it is equals to zero and enables it when it is one.
- include and define

- IDDES = 0
- = 0.65
- include incddes.h

- set default value, IDDES= 0,

- include incddes.h

- include default values for

- allocate new memory for gradient calculations, W10 and W11

- Define W10,W11 as double precision

- Working array W10 is

- Working array W11 is

**Source terms**

- Calculate .

- Calculate

- Calculate

- Calculate

- Add an if statement to the equation, where if IDDES.Eq.1 the change in will be switched on

- Include new working arrays, W10, W11 in the call to resebm

- Define W10 and W11 as double precision

- Change INEEDY IF statement to include ITURB = 32 to calculate the distance to the wall

- include incddes.h
- Include printout for IDDES
- include printout for

Topic revision: r6 - 2010-10-27 - 14:00:26 - NeilAshton

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