Session CB - L.E.S.
ORAL session, Sunday afternoon, November 24
Ballroom W, OnCenter
We present a general geometry large eddy simulation (LES) code based upon three-dimensional spectral elements. We employ a two parameter PDE-motivated filter which can be tuned for both order and cut-off wave number, and which satisfies boundary conditions appropriate for complex geometry flows. The SGS terms are treated by the Lilly version of the dynamic subgrid scale model. The filter has been tested for complex geometry flows, including a horseshoe vortex flow in a flat-plate/appendage configuration. We have observed that the filter is capable of retaining the large structures, such as hairpin vortices, while removing the high energy ``noise'' in under-resolved regions. The SGS model and the filter described above have been combined into a full LES code. We are currently validating the code against 3-D channel flow benchmark results.
