A parametrized non-equilibrium wall-model for large-eddy simulations
Abstract
Wall-models are essential for enabling large-eddy simulations (LESs) of realistic problems at high Reynolds numbers. The present study is focused on approaches that directly model the wall shear stress, specifically on filling the gap between models based on wall-normal ordinary differential equations (ODEs) that assume equilibrium and models based on full partial differential equations (PDEs) that do not. We develop ideas for how to incorporate non-equilibrium effects (most importantly, strong pressure-gradient effects) in the wall-model while still solving only wall-normal ODEs. We test these ideas using two reference databases: an adverse pressure-gradient turbulent boundary-layer and a shock/boundary-layer interaction problem, both of which lead to separation and re-attachment of the turbulent boundary layer.
Cite
@article{arxiv.1511.09356,
title = {A parametrized non-equilibrium wall-model for large-eddy simulations},
author = {Stefan Hickel and Emile Touber and Julien Bodart and Johan Larsson},
journal= {arXiv preprint arXiv:1511.09356},
year = {2015}
}
Comments
Center for Turbulence Research, Proceedings of the Summer Program 2012 8th International Symposium on Turbulence and Shear Flow Phenomena (TSFP8), 2013