ASSESSMENT OF RANS AND DES METHODS FOR THE AHMED BODY

Emmanuel Guilmineau, Gan Bo Deng, Alban Leroyer, Patrick Queutey, Michel Visonneau, Jeroen Wackers
2016 Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)   unpublished
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. A RANS (Reynolds Averaged Navier-Stokes) turbulence model, as EARSM (Explicit Algebraic Stress Model) and two hybrid RANS-LES models, as DES (Detached Eddy Simulation) and IDDES (Improved Delay Detached Eddy Simulation) models, are used. All these turbulence models are based on the k-ω model.The flow for the slant angle 35 •
more » ... he slant angle 35 • is well predicted by all turbulence models with a slight advantage for the IDDES model. However, for the flow with the slant angle 25 • , only the IDDES hybrid RANS-LES model predict the recirculation bubble on the slant. 912
doi:10.7712/100016.1860.10023 fatcat:vo2rfu4yjreapfvjgdrfmhjc4a