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Mechanical and Aerospace Engineering Department
Arizona State University
Abstract-
Two of the primary simulation techniques for predicting complex
turbulent flows at high Reynolds numbers are based on either the
Reynolds-averaged Navier-Stokes (RANS) equations or Large Eddy
Simulation (LES). Detached Eddy Simulation (DES) is a more recently
introduced hybrid method which attempts to capitalize on the most
favorable aspects of RANS and LES. DES appears well suited for
massively separated flows and application of the method to prediction
of the flow around a sphere will be presented. DES predictions in the
sub-critical regime at a Reynolds number of 10,000 are in good
agreement with measurements as well as results obtained using
full-domain LES. Predictions of the separation location and some
features of the wake for super-critical flows agree well with
measurements, though the streamwise drag is under-estimated.
Application of DES as an approach to wall-layer modeling and recent
predictions of high Reynolds number turbulent channel flow will also
be presented.
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