A comprehensive framework for robust hybrid RANS/LES simulations of wall-bounded flows in LBM.
Resource Type
Journal
Authors
Husson, J. (F-ONERA3-AES) AMS Author Profile; Terracol, M. (F-ONERA3-AES) AMS Author Profile; Deck, S. (F-ONERA3-AES) AMS Author Profile; Le Garrec, T. (F-ONERA-AES) AMS Author Profile
Source
Journal of Computational Physics (J. Comput. Phys.) (20240101), 502, Paper No 112814, 23~pp. ISSN: 0021-9991 (print).eISSN: 1090-2716.
Subject
65 Numerical analysis -- 65M Partial differential equations, initial value and time-dependent initial-boundary value problems 65M08 Finite volume methods
Summary: ``The present paper focuses on lattice Boltzmann method (LBM) simulations of turbulent flows in combination with a Zonal Detached Eddy Simulation (ZDES) approach, specifically its mode 2 (2020). A common issue of the concomitant use of LBM and DES type models is the systematic modeled-stressed depletion (MSD) triggered by fine isotropic grids imposed by the lattice. This issue is responsible for erroneous surface coefficients that can eventually lead to grid induced separation (GIS). In this work, it is shown that the enhanced boundary layer protection brought by ZDES mode 2 (2020) is sufficient to allow the combination of LBM and a DES type method for high Reynolds number with equal accuracy as its Navier-Stokes counterpart. The emphasis is put on the ability of ZDES to recover its main properties within the numerics of lattice Boltzmann formalism. This is achieved on multiple test-cases namely the turbulent flow over a flat plate, a backward facing step and a three-element airfoil.''