Merging and auto-generation of vortices in wall bounded flows

Manu Goudar Vishwanathappa, Wim-Paul Breugem, Gerrit Elsinga

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

For channel flow, we explore how a hairpin eddy may reach a threshold strength required to produce additional hairpins by means of auto-generation. This is done by studying the interaction of two eddies with different initial strengths (but both below the threshold strength), initial sizes and initial streamwise spacing between them. The numerical procedure followed is similar to Zhou et al. (1999). The two eddies were found to merge into a single stronger
eddy in case of a larger upstream and a smaller downstream eddy placed within a certain initial streamwise separation distance. Subsequently, the resulting stronger eddy was observed to auto-generate new eddies. Merging of eddies thus is a viable explanation for the creation of the threshold strength eddies.
Original languageEnglish
Title of host publicationProceedings 8th International Symposium on Turbulence and Shear Flow Phenomena
EditorsAV Johansson, R Friedrich, S Tavoularis
Place of PublicationMunich, Germany
PublisherTechnical University of Munich
Pages1-6
Publication statusPublished - 2013
EventTSFP-8, Poitiers, France - Munich, Germany
Duration: 28 Aug 201330 Aug 2013

Publication series

Name
PublisherTechnical University of Munich

Conference

ConferenceTSFP-8, Poitiers, France
Period28/08/1330/08/13

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  • Cite this

    Goudar Vishwanathappa, M., Breugem, W-P., & Elsinga, G. (2013). Merging and auto-generation of vortices in wall bounded flows. In AV. Johansson, R. Friedrich, & S. Tavoularis (Eds.), Proceedings 8th International Symposium on Turbulence and Shear Flow Phenomena (pp. 1-6). Technical University of Munich.