Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-18T18:58:55.485Z Has data issue: false hasContentIssue false
  • English
  • Français

Flow past a cylinder close to a free surface

Published online by Cambridge University Press:  10 January 1997

J. SHERIDAN ,
J.-C. LIN  and
D. ROCKWELL
J. SHERIDAN
Affiliation:
Department of Mechanical Engineering and Mechanics, 354 Packard Laboratory, 19 Memorial Drive West, Lehigh University, Bethleham, 18015, USA
J.-C. LIN
Affiliation:
Department of Mechanical Engineering and Mechanics, 354 Packard Laboratory, 19 Memorial Drive West, Lehigh University, Bethleham, 18015, USA
D. ROCKWELL
Affiliation:
Department of Mechanical Engineering and Mechanics, 354 Packard Laboratory, 19 Memorial Drive West, Lehigh University, Bethleham, 18015, USA
Get access Rights & Permissions [Opens in a new window]

Abstract

Flow past a cylinder beneath a free surface gives rise to fundamental classes of nearwake structure that are distinctly different from the wake of a completely submerged cylinder. A central feature is the generation of a vorticity layer from the free surface due to: localized separation, in the form of small-scale breaking of a free-surface wave; or complete separation from the free surface. This vorticity layer appears adjacent to a layer from the surface of the cylinder, thereby forming a jet-like flow. It is shown that the instantaneous vorticity flux on either side of this jet is rapidly balanced immediately after the onset of separation from the free surface.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 330 , 10 January 1997 , pp. 1 - 30
Copyright
© 1997 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)