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A Consistent Approach to Large Eddy Simulation Using Adaptive Mesh Refinement

✍ Scribed by Andrew W Cook

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
113 KB
Volume
154
Category
Article
ISSN
0021-9991

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✦ Synopsis

The large eddy simulation of turbulent flows is discussed with particular attention paid to the issue of commutation of differentiation and filtering. Multi-level adaptive mesh refinement is proposed as a means of mostly avoiding commutation errors where increased grid resolution is required to capture key flow features. The strategy is to employ multiple uniform grids in a nested hierarchy using a constant-width filter for each grid. It is shown that commutivity of fine and coarse grid filters must be enforced in order to consistently relate variables at different refinement levels. Methods for treating fine grid boundaries and walls are also discussed. It is shown that errors associated with boundary treatments are small and localized.

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