Application of hybrid and VMS-LES turbulent models to aerodynamic simulations

Anca Belme Alain Dervieux (INRIA, BP93, 06902 Sophia-Antipolis, France) Bruno Koobus (Université de Montpellier) Steve Wornom (LEMMA S.A., Sophia-Antipolis, France) Maria-Vittoria Salvetti (Scuola Normale Superiore di Pisa, Italy)

Proceedings of ICAS 2010 (8 pages)

Abstract: We report on investigations for designing and validating VMS-LES and hybrid approaches between RANS and VMS-LES. Beside several more usual hybridization, we propose a new hybrid RANS/LES approach for the simulation of turbulent flows, which can be interpreted in the framework of the Non-Linear Disturbance Equation (NLDE) aproach. The solution of the Navier-Stokes equations is decomposed into a mean part (RANS), a perturbed/corrected part that takes into account the turbulent large-scale fluctuations and a third part made by the unresolved (SGS) fluctuations. Several flows past cylinder and spheres are computed for validating the considered approaches. The NLDE approach is used to simulate the flow around a circular cylinder at Reynolds number 140000; results are compared with a simplified version of the hybrid model.

Keywords: Navier-Stokes, turbulence Model, hybrid scheme, cylinder, sphere.

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@inproceedings{BDKWS10,
  author = {Belme, A. and Dervieux, A. and Koobus, B. and Wornom, S. and Salvetti, M.-V.},
  title = {Application of hybrid and {VMS}-{LES} turbulent models to aerodynamic simulations},
  booktitle = {Proceedings of ICAS Conference},
  address={Nice},
  URL = {http://www.icas.org/ICAS_ARCHIVE_CD1998-2010/ICAS2010},
  year = 2010
}