An Exact SGS-Model for Les
Part of the
Fluid Mechanics and its Applications
book series (FMIA, volume 36)
A new class of Sub-Grid-Scale (SGS) formulations is presented. This class of SGS formulations enables one to derive closed forms of the SGS terms, in contrast to other methods that model these terms. The main difficulty with the exact SGS formulation is the additional data required on the boundaries. A particular form of the SGS terms, belonging to the class, has been implemented for simulating different transitional and turbulent flows. Here, we present some results for wall-free jet flows. For this type of flows, one avoids the difficulties at the boundaries, and therefore may study directly the effects of the SGS formulation. Simulated results have been compared with experimental data and simulations using dynamic SGS model. The new SGS formulation seems to reproduce very well the experimental data.
KeywordsLarge Eddy Simulation Axial Velocity Component Inverse Filter Local Grid Refinement Differential Filter
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© Kluwer Academic Publishers 1996