Hybrid RANS/LES calculations in SU2

Abstract

© 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.This paper presents a detailed overview of hybrid RANS/LES methods as implemented within the open-source SU2 software package. We focus on the extensions of the existing RANS framework based upon the Spalart-Allmaras turbulence model that are necessary to apply the Delayed Detached-Eddy Simulation (DDES) technique. Particular emphasis is placed upon the low dissipation and low Mach number convective schemes required to maintain accuracy within the context of performing DDES in a second-order, finite volume, unstructured flow solver. We conclude with a suite of test cases across different regimes to demonstrate our DDES capability on both academic and industrial-grade applications.