PERFORMANCE IMPACT: ANALYZING THE INFLUENCE OF THE BLENDING PARAMETER σ OF THE HYBRID RECURSIVE REGULARIZATION BGK COLLISION SCHEME ON WMLES IN TURBULENT LBM SIMULATIONS

Abstract

This work investigates the influence of the blending parameter σ on the Hybrid Recursive Regularized BGK collision scheme with and without a correction term on the selection of LES and wall model. The comparison is done using the well-known turbulent channel flow test case at a friction Reynolds number Reτ of 1000. The wall is either modeled via the implicit Musker profile or explicitly with a combination of the Werner and Wengle and the Schmitt profile. The considered LES models are the Wall-Adapting Local Eddy-viscosity (WALE) and the Vreman model. For the discretization of the velocity space both, the D3Q19 and D3Q27 stencil are considered. Different resolutions of the channel are studied, leading to y+ values of the first cell at the wall y1+ = 12.5, 25 and 50. The entire range of σ values in the interval [0.0, 1.0] is analysed.