Towards a statistically accurate wall-model for large-eddy simulation

Abstract

This study proposes to investigate the development of a new generation of wall-models for large-eddy simulation (LES) based on the observation that large-scale motions occurring in a turbulent boundary layer leave their "footprint" in the vicinity of the wall. Following these observations, Marusic et al. [8, 11] proposed a novel conceptual model able to predict wall shear-stress fluctuation with a high level of fidelity. Making use of a numerical/experimental database covering two decades of Reynolds numbers, a series of a priori tests is proposed here to highlight the benefits of this new approach comparatively to a standard log-law approach. A correction of the model is finally proposed to..