Multi-scale simulation of near-wall turbulent flows

Ayse Gul Gungor, Suresh Menon

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

A hybrid two-level large eddy simulation (TLS-LES) is used to study turbulent flow in a converging-diverging channel, which represents a challenging test case due to the appearance of flow separation and subsequent reattachment. While a conventional LES using a localized dynamic subgrid model is employed away from the wall, in the near-wall region a new two-scale approach called the two-level simulation (TLS) approach is employed. A hybrid scale separating operator is used to couple the LES and TLS regimes, and the combined approach that does not contain any ad hoc adjustable parameters is used to simulate high Re wall-bounded flows. The results show that the hybrid TLS-LES approach yields very reasonable predictions of most of the crucial flow features in-spite of using a relatively coarse large-scale grid.

Original languageEnglish
Title of host publicationDirect and Large-Eddy Simulation VII - Proceedings of the 7th International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, 2008
EditorsBernard Geurts, Jochen Frohlich, Vincenzo Armenio
PublisherSpringer Netherland
Pages161-166
Number of pages6
ISBN (Print)9789048136513
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event7th International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, 2008 - Trieste, Italy
Duration: 8 Sept 200810 Sept 2008

Publication series

NameERCOFTAC Series
Volume13
ISSN (Print)1382-4309
ISSN (Electronic)2215-1826

Conference

Conference7th International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, 2008
Country/TerritoryItaly
CityTrieste
Period8/09/0810/09/08

Bibliographical note

Publisher Copyright:
© Springer Science+Business Media B.V. 2010.

Funding

The authors are grateful to J.-P. Laval for providing the DNS data. This work is supported by the Office of Naval Research.

FundersFunder number
Office of Naval Research

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