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TWiki> Main Web>TWikiUsers>NeilAshton>V2FDDES (2012-04-28, NeilAshton)

TWiki> Main Web>TWikiUsers>NeilAshton>V2FDDES (2012-04-28, NeilAshton)

This page contains the equations necessary for the implementation of the DDES model into Code Saturne v2.0.1.

See A hybrid numerical scheme for a new formulation of delayed detached-eddy simulation (DDES) based on elliptic relaxation, N. Ashton, A. Revell, R. Prosser, Journal of Physics: Conference Series, 13th European Turbulence Conference, Vol. 318, (2011)

See 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).

Laurence, D L, Uribe, J C & Utyuzhinkov, S V 2004 A robust formulation of the v2 − f model. Flow Turbulence and Combustion 73, 169–185.

Destruction term in the equation

(1) |

Where the function is:

(2) |

(3) |

Where, , and is the distance to the wall

- include and define the index values , IDDES, which turns off the change in K transport equation if it is equals to zero and enables it when it is 1 or 2 depending on the formulation.
- include and define .

- Extra memory is required for the storage of the wall distance and . The call headers need to be changed to include extra working arrays, W10 and W11.

- W10 and W11 defined as double precision.

The DDES model will run using an index argument, where if IDDES.EQ.2 then the DDES modification will be used.

- 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.2 then the becomes

- Change memkep call to include extra working arrays W10 and W11

- Change call to turbke, to include extra working arrays W10 and W11

- Add extra working arrays, IW10, IW11

- Change definitions, integers for IW10, IW11

- Change memory pointers to include new working arrays

- Change INEEDY IF statement to include the v2f model. i.e ITURB = 50 to calculate the distance to the wall

- set default value, IDDES = 0

- include incddes.h

- include default values for

- IDDES = 0
- = 0.60
- include incddes.h

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

- include incddes.h
- include an IF statement to check that SAS and DDES cannot run at the same time.

I | Attachment | Action | Size | Date | Who | Comment |
---|---|---|---|---|---|---|

cddes_phif_etc.pdf | manage | 151.2 K | 2011-06-21 - 20:47 | NeilAshton | Cddes calibration for the phif DDES model |

Topic revision: r4 - 2012-04-28 - 21:27:03 - NeilAshton

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