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The steady boundary layer due to a fast vortex

 

作者: Andrew J. Bernoff,   Harald J. H. M. van Dongen,   Seth Lichter,  

 

期刊: Physics of Fluids  (AIP Available online 1996)
卷期: Volume 8, issue 1  

页码: 156-162

 

ISSN:1070-6631

 

年代: 1996

 

DOI:10.1063/1.868823

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A point vortex located above and convected parallel to a wall is an important model of the process by which a boundary layer becomes unstable due to external disturbances. Often it has been assumed that the boundary layer due to the passage of the vortex is inherentlyunsteady. Here we show that for a vortex convected by a uniform shear flow, there is asteadysolution when the speed of the vortexcvis sufficiently fast. The existence of the steady solution is demonstrated analytically in the limit of large vortex velocity (cv→∞) and numerically at more moderate speeds. This solution may provide a useful base state about which to investigate the stability of a boundary layer induced by external disturbances. ©1995 American Institute of Physics.

 

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