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Stratified flow past a sphere

Published online by Cambridge University Press:  26 April 2006

Q. Lin ,
W. R. Lindberg ,
D. L. Boyer  and
H. J. S. Fernando
Q. Lin
Affiliation:
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106, USA
W. R. Lindberg
Affiliation:
Department of Mechanical Engineering, University of Wyoming, Laramie, Wyoming 82071-3295, USA
D. L. Boyer
Affiliation:
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106, USA
H. J. S. Fernando
Affiliation:
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106, USA
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Abstract

The flow of a linearly stratified fluid past a sphere is considered experimentally in the Froude number Fi, Reynolds number Re, ranges 0.005 ≤ Fi ≤ 20 and 5 ≤ Re ≤ 10000. Flow visualization techniques and density measurements are used to describe the rich range of characteristic flow phenomena observed. These different flow patterns are mapped on a detailed Fi against Re flow regime diagram. In most instances the flow patterns were found to be very different from those observed in homogeneous fluids. Vortex shedding characteristics, for example, were found to be dramatically affected by the presence of stratification. Where possible, the results are compared with available analytical and numerical models.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 240 , July 1992 , pp. 315 - 354
Copyright
© 1992 Cambridge University Press

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