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Oscillatory flow around disks and through orifices

Published online by Cambridge University Press:  20 April 2006

B. de Bernardinis ,
J. M. R. Graham  and
K. H. Parker
B. de Bernardinis
Affiliation:
Physiological Flow Studies Unit, Department of Aeronautics, Imperial College, London
J. M. R. Graham
Affiliation:
Physiological Flow Studies Unit, Department of Aeronautics, Imperial College, London
K. H. Parker
Affiliation:
Physiological Flow Studies Unit, Department of Aeronautics, Imperial College, London
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Abstract

Two examples of unsteady, axisymmetric, separated flows are studied: unbounded oscillatory flow around a disk and bounded oscillatory flow through a sharp-edged orifice. Calculations are made assuming that the flow is inviscid and that the shed vortex sheets can be represented by sequences of discrete vortex rings. The solid bodies (i.e. the disk or the orifice and bounding tube) are also represented by a distribution of bound discrete vortex rings whose strengths are chosen to satisfy the Neumann or zero normal velocity boundary condition.

The results of flow visualization experiments and, for the orifice, pressure drop measurements are also reported. In general, the gross properties of the flows are predicted accurately.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 102 , January 1981 , pp. 279 - 299
Copyright
© 1981 Cambridge University Press

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