[EMolina]

Dear Jianming Liu and SU2 developers.

Firstly, I would like to thank Jianming Liu for sharing his initial Detached eddy simulation (DES) Implementation.

I would like to share with the community the results of the Delayed Detached Eddy Implementation in the SU2 code. The test case is a High Reynolds Number Flow around a NACA0021 Airfoil in Deep Stall. Please see following links containing the experimental data and results from others solvers.

http://uriah.dedi.melbourne.co.uk/w/index.php/UFR_2-11

http://agarbaruk.professorjournal.ru...=DLFE-6685.pdf

The mesh was generated in order to be similar to the course grid of the NTS partner. Grid size ~ 0.5e6 Nodes, Lz=1c, \deltaZ=0.03c and Y+<1.0 with periodic boundary conditions in the spanwise (z) direction.

This was the first simulation using the DDES approach, so I did not played with the Spatial Discretization options, I used Roe Scheme with 2nd Order Limiter (LIMITER_COEFF= 10.0). As expected, the Upwind scheme damped the high frequency waves so additional modifications should be made to adequate the numerical dissipation levels for a Large Eddy Simulation.

I would like to perform the folowing modifications:
- In order to validate the solver in the LES mode, the simulation of decaying homogenous isotropic turbulence should be done and computed with the experimental resuls of Comte-Bellot, assessing the impact of numerical dissipation on solution accuracy. How can I perform a rapid modification in the code to simulate a periodic cube in 3 directions?
- Anyone implemented the matrix-based artificial dissipation instead of the scalar one in the JST scheme? If no, can someone guide me in the code to perform such modification.
- It is possible to perform a hybrid discretization in SU2(Central Scheme in LES regions and Upwind in RANS regions) as Travin proposed in his article.

If possible I would like to rear this discussion in SU2 Youtube channel.

Best regards,

Eduardo.


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