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On a class of SGS filters for LES with shape preserving concatenation properties

Oberlack, Martin :
On a class of SGS filters for LES with shape preserving concatenation properties.
[Online-Edition: http://www.sciencedirect.com/science/article/pii/S1007570411...]
In: Communications in Nonlinear Science and Numerical Simulation, 16 (11) pp. 4403-4407. ISSN 1007-5704
[Article] , (2011)

Official URL: http://www.sciencedirect.com/science/article/pii/S1007570411...

Abstract

We develop a class of filter functions for large-eddy simulation which have the key property that multiple successive application even with different filter widths is equal to a single filtering employing filters from the same class but at an extended or equal filter width. In the context of the filter class development we obtain a functional delay equation which for special cases may be solved completely general. The presently developed class of filters may be used in conjunction with certain sub-grid scale models such as the approximate deconvolution model 3 where explicit multiple filtering is needed. Hence utilizing filters from the present class computational cost of filter evaluation may be considerably reduced.

Item Type: Article
Erschienen: 2011
Creators: Oberlack, Martin
Title: On a class of SGS filters for LES with shape preserving concatenation properties
Language: English
Abstract:

We develop a class of filter functions for large-eddy simulation which have the key property that multiple successive application even with different filter widths is equal to a single filtering employing filters from the same class but at an extended or equal filter width. In the context of the filter class development we obtain a functional delay equation which for special cases may be solved completely general. The presently developed class of filters may be used in conjunction with certain sub-grid scale models such as the approximate deconvolution model 3 where explicit multiple filtering is needed. Hence utilizing filters from the present class computational cost of filter evaluation may be considerably reduced.

Journal or Publication Title: Communications in Nonlinear Science and Numerical Simulation
Volume: 16
Number: 11
Publisher: Elsevier Science
Uncontrolled Keywords: Turbulence modeling; Large eddy simulation; Sub-grid scale filter
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Fluid Dynamics (fdy)
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Date Deposited: 24 Aug 2011 18:17
Official URL: http://www.sciencedirect.com/science/article/pii/S1007570411...
Additional Information:

DOI: 10.1016/j.cnsns.2011.03.023

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