Large-eddy simulations of high Reynolds-number flow over a contoured ramp

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

Radhakrishnan, S (Author) Other; Keating, A (Author) Other; Piomelli, U (Author) Other; A. Silva Lopes (Author) Other

Conference proceedings International

Title: Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting

44th AIAA Aerospace Sciences Meeting 2006

Reno, NV, 9 January 2006 through 12 January 2006

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-007-HY4

Abstract (EN): Large-eddy simulations (LES) of the flow over a smooth, contoured ramp at high Reynolds number have been performed. The calculations use a wall model based on the Detached Eddy Simulation technique, in which the near-wall region is modeled by solving the unsteady Reynolds-Averaged Navier-Stokes (RANS) equations, while the outer flow is computed using LES. Experimental results are used to evaluate the models. The error in the mean velocity field predicted by the LES is always less than 10%; an overestimation of the turbulent kinetic energy in the separated shear layer is also observed. The inclusion of a stochastic forcing term, which enhances the generation of resolved eddies near the RANS/LES interface, results in more accurate prediction of the Reynolds stresses in the separation and recovery regions. The turbulent eddies generated are also more realistic. Copyright

Language: English

Type (Professor's evaluation): Scientific