Topology and dynamics of flow structures in wall-bounded turbulent flows

Yoshinori Mizuno, Callum Atkinson, Julio Soria

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

2 Citations (Scopus)

Abstract

Fine-scale structures in a turbulent channel flow and boundary layer at comparable Reynolds numbers are studied through the velocity gradient tensor. The joint pdf of the two invariants of the tensor that characterize the topology of the structures collapse well among these flows under the Kolmogorov scaling in both, the inner and outer layers. However, the averaged time-evolution of the invariant differs among these flows even in the inner layer. This discrepancy is caused by the different effect of the pressure field on the dynamics of these invariants. By using filtered velocity fields, large-scale structures in the outer layer have also been studied. Their topology is similar to smaller-scales, but less intermittency is observed.

Original languageEnglish
Title of host publicationAdvances in Turbulence XIII
Subtitle of host publicationProceedings of the 13th European Turbulence Conference
EditorsK. Bajer, J. Kopeć, M. Kursa, K. Kwiatkowski, P. Podziemski
PublisherIOP Publishing
Number of pages9
DOIs
Publication statusPublished - 2011
Event13th European Turbulence Conference, ETC 13 - Warsaw, Poland
Duration: 12 Sep 201115 Sep 2011
Conference number: 13
http://www.euromech.org/conferences/ETC/ETC13

Publication series

NameJournal of Physics: Conference Series
PublisherInstitute of Physics Publishing Ltd.
Volume318
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596

Conference

Conference13th European Turbulence Conference, ETC 13
Abbreviated titleETC13
CountryPoland
CityWarsaw
Period12/09/1115/09/11
Internet address

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