Conference Proceedings
Modelling of wall shear-stress fluctuations for Large-Eddy Simulation
W Sidebottom, O Cabrit, I MARUSIC, C Meneveau, A Ooi, D Jones
Australasian Fluid Mechanics Society (AFMS) | Published : 2014
Abstract
A new wall-model that is able to predict the fluctuating wall shear-stress from a large-scale velocity input is investigated. The model is based on the spectral structure of the turbulent boundary layer and the interaction between large-scale events in the logarithmic layer and small scale events near the wall. The model is implemented in large-eddy simulations to assess its efficacy compared to a 'standard' wall model. Results show that the new wall-model has a small effect on mean quantities-the skin-friction coefficient and mean velocity profile-in the outer-regions of the boundary layer, and is able to resolve more of the wall shear-stress variance than the standard wall-model.