A General Class of Commutative Filters for LES in Complex Geometries

A General Class of Commutative Filters for LES in Complex Geometries

A class of filters for large eddy simulations of turbulent inhomogeneous flows is presented. A general set of rules for constructing discrete filters in complex geometry is given and examples of such filters are presented. With these filters the commutation error between numerical differentiation an...

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Veröffentlicht in:Journal of computational physics 1998-10, Vol.146 (1), p.82-104
Hauptverfasser: Vasilyev, Oleg V., Lund, Thomas S., Moin, Parviz
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container_title Journal of computational physics
container_volume 146
creator Vasilyev, Oleg V.
Lund, Thomas S.
Moin, Parviz
description A class of filters for large eddy simulations of turbulent inhomogeneous flows is presented. A general set of rules for constructing discrete filters in complex geometry is given and examples of such filters are presented. With these filters the commutation error between numerical differentiation and filtering can be made arbitrarily small, allowing for derivation of a consistent set of equations for the large scale field. The application of such filters for explicit filtering in large eddy simulations and the issue of boundary conditions for the filtered field are also discussed.
doi_str_mv 10.1006/jcph.1998.6060
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title A General Class of Commutative Filters for LES in Complex Geometries
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