Oscillation in Height of a Negatively Buoyant Jet

[+] Author and Article Information
P. D. Friedman

Department of Mechanical Engineering, University of Massachusetts Dartmouth, Dartmouth, MA 02747pfriedman@umassd.edu

J. Fluids Eng 128(4), 880-882 (Dec 01, 2005) (3 pages) doi:10.1115/1.2201647 History: Received March 14, 2005; Revised December 01, 2005

First Page Preview

View Large
First page PDF preview
Copyright © 2006 by American Society of Mechanical Engineers
Topics: Oscillations
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

(a) Negatively buoyant fountain discharging into a lighter fluid above; (b) Negatively buoyant jet impinges on an interface with a lighter fluid

Grahic Jump Location
Figure 2

(a) Stable, nonoscillatory flow pattern above the transitional Richardson number (Ri>1). For (Ri<1) a cycle develops that starts with (b), the formation of a tall unstable fountain, which loses symmetry (c) and collapses (d)

Grahic Jump Location
Figure 3

Amplitude of oscillation in height of a negatively buoyant jet [(hUpper−hLower)∕hLower×100%], where hUpper=h¯Max+σhMax (the average height at the top of the oscillations plus the standard deviation in the upper height). The lower height is defined similarly hLower=h¯Min−σhMin

Grahic Jump Location
Figure 4

Oscillation frequency of a negatively buoyant jet in terms of a dimensionless Strouhal number (fD∕U).




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