Detached eddy simulation

Detached eddy simulation (DES) is a modification of a Reynolds-averaged Navier–Stokes equations (RANS) model in which the model switches to a subgrid scale formulation in regions fine enough for large eddy simulation (LES) calculations.

Details

Regions near solid boundaries and where the turbulent length scale is less than the maximum grid dimension are assigned the RANS mode of solution. As the turbulent length scale exceeds the grid dimension, the regions are solved using the LES mode. Therefore, the grid resolution is not as demanding as pure LES, thereby considerably cutting down the cost of the computation. Though DES was initially formulated for the Spalart-Allmaras model,^[1] it can be implemented with other RANS models (Strelets, 2001), by appropriately modifying the length scale which is explicitly or implicitly involved in the RANS model.]</ref>

References

^ Spalart, P.R. (August 1997). Comments on the feasibility of LES for wing and on a hybrid RANS/LES approach. 1st ASOSR CONFERENCE on DNS/LES. Arlington, TX.

External links

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[1] Spalart, P.R. (August 1997). Comments on the feasibility of LES for wing and on a hybrid RANS/LES approach. 1st ASOSR CONFERENCE on DNS/LES. Arlington, TX.

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