Inscrição na biblioteca: Guest
TSFP DL Home Arquivos Comitê executivo

A HYBRID TEMPORAL LES/RANS FORMULATION BASED ON A TWO-EQUATION SUBFILTER MODEL

Yacine Bentaleb
Aeronautics Department, Imperial College London, Prince Consort Rd., London SW7 2AZ, United Kingdom

Remi Manceau
Institute Pprime, Dept. Fluid flow, heat transfer and combustion, CNRS-Univ. of Poitiers-ENSMA, France; Lab. de mathematiques et de leurs applications (LMA) CNRS-Universite de Pau et des pays de I'Adour IPRA, avenue de I'universite 64013 Pau, France; Inria Bordeaux-Sud-Ouest, project-team CAGIRE

Resumo

A novel hybrid model for statistically stationary flow simulations at moderate to high Reynolds numbers is presented. Based on a consistent formalism developed for seamless hybrid temporal LES/RANS methodologies (Fadai-Ghotbi et al., 2010b; Schiestel and Dejoan, 2005), the Temporal Partially-Integrated Transport Model (TPITM) approach is used to derive a two-equation subfilter model, consistent with the k − ω SST model in the RANS limit, i.e., when the temporal filter width goes to infinity. Comparisons are made with a widespread hybrid RANS/LES model, the DES−SST formulation (Menter et al., 2003), which tends to the same RANS model in the RANS zones, but uses the Detached Eddy Simulation (DES) methodology to control the transition from RANS to LES. The paper discusses the features and capabilities of both approaches.