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Rotating elliptic cylinders in a viscous fluid at rest or in a parallel stream

Published online by Cambridge University Press:  11 April 2006

Hans J. Lugt  and
Samuel Ohring
Hans J. Lugt
Affiliation:
David W. Taylor Naval Ship Research and Development Center, Bethesda, Maryland 20084
Samuel Ohring
Affiliation:
David W. Taylor Naval Ship Research and Development Center, Bethesda, Maryland 20084
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Abstract

Numerical solutions are presented for laminar incompressible fluid flow past a rotating thin elliptic cylinder either in a medium at rest at infinity or in a parallel stream. The transient period from the abrupt start of the body to some later time (at which the flow may be steady or periodic) is studied by means of streamlines and equi-vorticity lines and by means of drag, lift and moment coefficients. For purely rotating cylinders oscillatory behaviour from a certain Reynolds number on is observed and explained. Rotating bodies in a parallel stream are studied for two cases: (i) when the vortex developing at the retreating edge of the thin ellipse is in front of the edge and (ii) when it is behind the edge.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 79 , Issue 1 , 20 January 1977 , pp. 127 - 156
Copyright
© 1977 Cambridge University Press

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