Please use this identifier to cite or link to this item: doi:10.22028/D291-26511
Title: A variational multiscale method for turbulent flow simulation with adaptive large scale space
Author(s): John, Volker
Kindl, Adela
Language: English
Year of Publication: 2009
DDC notations: 510 Mathematics
Publikation type: Other
Abstract: In turbulent flows it is only feasible to simulate large flow structures. Variational multiscale (VMS) methods define these flow structures by projections into appropriate function spaces. This paper presents a finite element VMS method which defines the large scale projection space adaptively. The adaption controls the influence of an eddy viscosity model and it is based on the size of the so–called resolved small scales. The adaptive procedure is described in detail. Numerical studies at a turbulent channel flow and a turbulent flow around a cylinder are presented. It is shown that the method selects the large scale space in a correct way and that appropriately chosen parameters improve the results compared to the basic method, which uses the same local large scale space in the whole domain and for all times.
Link to this record: urn:nbn:de:bsz:291-scidok-47624
Series name: Preprint / Fachrichtung Mathematik, Universität des Saarlandes
Series volume: 228
Date of registration: 6-Jun-2013
Faculty: MI - Fakultät für Mathematik und Informatik
Department: MI - Mathematik
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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