Wall-modeled large-eddy simulation integrated with synthetic turbulence generator for multiple-relaxation-time lattice Boltzmann method

The synthetic turbulence generator (STG) lies at the interface of the Reynolds averaged Navier–Stokes (RANS) simulation and large-eddy simulation (LES). This paper presents an STG for the multiple-relaxation-time lattice Boltzmann method (LBM) framework at high friction Reynolds numbers, with consid...

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Bibliographic Details
Published in:Physics of fluids (1994) 2023-06, Vol.35 (6)
Main Author: Davidson, Lars
Format: Article
Language:English
Subjects:
Boundary layer thickness
Channel flow
Computational fluid dynamics
Direct numerical simulation
Flow simulation
Fluid dynamics
Fluid flow
Large eddy simulation
Mathematical models
Physics
Reynolds number
Turbulence
Vortices
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Summary:The synthetic turbulence generator (STG) lies at the interface of the Reynolds averaged Navier–Stokes (RANS) simulation and large-eddy simulation (LES). This paper presents an STG for the multiple-relaxation-time lattice Boltzmann method (LBM) framework at high friction Reynolds numbers, with consideration of near-wall modeling. The Reichardt wall law, in combination with a force-based method, is used to model the near-wall field. The STG wall-modeled LES results are compared with turbulent channel flow simulations at R e τ = 1000 , 2000 , 5200 at different resolutions. The results demonstrate good agreement with direct numerical simulation, with the adaptation length of 6–8 boundary layer thickness. This method has a wide range of potentials for hybrid RANS/LES-LBM related applications at high friction Reynolds numbers.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0153526