Vortex filament simulation of the longitudinal vortices found in the wake of a bluff body

J. Wu, J. Sheridan, M. C. Welsh

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

2 Citations (Scopus)

Abstract

In this paper, a three-dimensional inviscid vortex filament method is used to illustrate the formation mechanism of counter-rotating longitudinal vortices found in the wake of a bluff body. A vortex filament is introduced into the velocity field of an ideal Karman vortex street, and its three-dimensional evolution is tracked in the Lagrangian frame of reference. It is demonstrated that a localized perturbation, consisting of a small displacement of the vortex filament, spreads across the span of the filament, due to self-induction, to form wave-type pattern. The 'waves' are further stretched due to the background velocity field of the vortex street, forming counter-rotating longitudinal vortices.

Original languageEnglish
Title of host publicationBoundary Layer and Free Shear Flows
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages187-194
Number of pages8
ISBN (Print)0791813673
Publication statusPublished - 1 Jan 1994
EventProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, United States of America
Duration: 19 Jun 199423 Jun 1994

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume184

Conference

ConferenceProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18)
CountryUnited States of America
CityLake Tahoe
Period19/06/9423/06/94

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