ASSESSMENT OF TURBULENCE MODELS FOR FLOW SIMULATION AROUND THE AHMED BODY

Emmanuel Guilmineau (1) , Ganbo Deng (1) , P. Queutey (1) , Michel Visonneau (1)

1 LHEEA - Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique

This paper presents numerical simulations for the prediction of the flow around the Ahmed body, with the 25 • and 35 • slant angles, obtained with the flow solver ISIS-CFD. Two RANS (Reynolds Averaged Navier-Stokes) turbulence models, as the k − ω SST and the EARSM (Explicit Algebraic Stress Model) and two hybrid RANS-LES models, as DES (De-tached Eddy Simulation) and IDDES (Improved Delay Detached Eddy Simulation) models, are used. The use of a hybrid RANS-LES model, and more particularly the IDDES model, offers an advantage over RANS models in term of the force coefficients, and general flow field.

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]; Analyse numérique [math.NA]; Calcul parallèle, distribué et partagé [cs.DC]

Emmanuel Guilmineau, Ganbo Deng, P. Queutey, Michel Visonneau. ASSESSMENT OF TURBULENCE MODELS FOR FLOW SIMULATION AROUND THE AHMED BODY. 11th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements - ETMM11, Sep 2016, Palerme, Italy. ⟨hal-02570941⟩