The dominant wave mode within a trailing line vortex

James P. Denier; Jillian A K Stott

doi:10.1063/1.1814583

The dominant wave mode within a trailing line vortex

James P. Denier^*, Jillian A K Stott

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We identify the dominant, or most unstable, wave mode for the flow in a trailing line vortex. This dominant mode is found to reside in a wavenumber regime between that of inviscid wave modes and the viscous upper branch neutral wave modes. A reevaluation of the growth rate in the vicinity of the upper branch of the curve of neutral stability allows us to predict the neutral value of the azimuthal and axial wavenumber as a function of the imposed swirl within the trailing line vortex.

Original language	English
Article number	014101
Pages (from-to)	1-9
Number of pages	9
Journal	Physics of Fluids
Volume	17
Issue number	1
DOIs	https://doi.org/10.1063/1.1814583
Publication status	Published - Jan 2005
Externally published	Yes

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10.1063/1.1814583

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abstract = "We identify the dominant, or most unstable, wave mode for the flow in a trailing line vortex. This dominant mode is found to reside in a wavenumber regime between that of inviscid wave modes and the viscous upper branch neutral wave modes. A reevaluation of the growth rate in the vicinity of the upper branch of the curve of neutral stability allows us to predict the neutral value of the azimuthal and axial wavenumber as a function of the imposed swirl within the trailing line vortex.",

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AB - We identify the dominant, or most unstable, wave mode for the flow in a trailing line vortex. This dominant mode is found to reside in a wavenumber regime between that of inviscid wave modes and the viscous upper branch neutral wave modes. A reevaluation of the growth rate in the vicinity of the upper branch of the curve of neutral stability allows us to predict the neutral value of the azimuthal and axial wavenumber as a function of the imposed swirl within the trailing line vortex.

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The dominant wave mode within a trailing line vortex

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