Long-wavelength vortex motion induced by free-stream turbulence

S. Bailey, B. Estejab, M. Robert, S. Tavoularis

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

This study further examines experimentally the motion of an isolated vortex immersed in grid-generated free-stream turbulence. Using a novel analytical procedure, we determined approximately the time history of the vortex axis position from velocity vectors at two locations measured simultaneously with the use of hot-wire anemometry. We identified a long-wavelength, organized, helical motion of the vortex axis, which is present in both low-turbulence and high-turbulence streams, thus pointing to a universal instability mechanism. Free-stream turbulence appears to intensify this instability, while simultaneously enhancing the stochastic motion of the vortex axis.

Original languageEnglish
StatePublished - 2011
Event7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada
Duration: Jul 28 2011Jul 31 2011

Conference

Conference7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
Country/TerritoryCanada
CityOttawa
Period7/28/117/31/11

Bibliographical note

Publisher Copyright:
© 2011 International Symposium on Turbulence and Shear Flow Phenomena, TSFP07. All rights reserved.

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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