Large Eddy Simulation of High-Reynolds-Number Wall Bounded Flows

Large-eddy simulation (LES) of wall-bounded flows becomes prohibitively expensive at high Reynolds numbers if one attempts to resolve the small but dynamically important vortical structures in the near-wall region. The LES wall-boundary condition problem is thus to account for the effects of the near-wall turbulence between the wall and the first node and its transfer of momentum to the wall. Here we state the problem and give a brief overview of methods currently in use and possible future methods. To illustrate the problem and quantify the accuracy of some of the models, we present a few results from test cases ranging from fully developed turbulent channel flows to three-dimensional problems of practical engineering interest