Computation of Several Turbulent Flows with the Des-Sa Model

Due to the high computational cost, well-resolved large-eddy simulation (LES) of wall-bounded turbulent flows at very high Reynolds number is still difficult. To deal with this issue, Detached-eddy simulation (DES) is used in engineering applications. In this study, several turbulent flows are computed with DES based on Spalart-Allmaras (SA) model. The performance of the DES-SA model is validated in fully developed turbulent channel flow, turbulent flow around a NACA0012 airfoil and turbulent flow in a centrifugal pump. In the channel flow, Delayed DES (DDES), which is the update version of DES, is also tested. The advantages and disadvantages of the DES-SA model are summarized. Possible approaches to improve the DES-SA model are discussed.

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