RESEARCH PAPERS: Offshore Mechanics

Viscosity Effects on the Radiation Hydrodynamics of Horizontal Cylinders

[+] Author and Article Information
R. W. Yeung, C.-F. Wu

Department of Naval Architecture and Offshore Engineering, University of California, Berkeley, CA 94720

J. Offshore Mech. Arct. Eng 113(4), 334-343 (Nov 01, 1991) (10 pages) doi:10.1115/1.2919939 History: Received October 01, 1990; Revised June 11, 1991


The problem of a body oscillating in a viscous fluid with a free surface is examined. The Navier-Stokes equations and boundary conditions are linearized using the assumption of small body-motion to wavelength ratio. Generation and diffusion of vorticity, but not its convection, are accounted for. Rotational and irrotational Green functions for a divergent and a vorticity source are presented, with the effects of viscosity represented by a frequency Reynolds number Rσ = g 2 /ν σ 3 . Numerical solutions for a pair of coupled integral equations are obtained for flows about a submerged cylinder, circular or square. Viscosity-modified added-mass and damping coefficients are developed as functions of frequency. It is found that as Rσ approaches infinity, inviscid-fluid results can be recovered. However, viscous effects are important in the low-frequency range, particularly when Rσ is smaller than O(104 ).

Copyright © 1991 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In