0

Full Content is available to subscribers

Subscribe/Learn More  >

Quantitative Investigation of Coherent Structures in a Free Jet Using PIV and POD

[+] Author Affiliations
A.-M. Shinneeb, J. D. Bugg

University of Saskatchewan, Saskatoon, SK, Canada

R. Balachandar

University of Windsor, Windsor, ON, Canada

Paper No. FEDSM2006-98269, pp. 445-452; 8 pages
doi:10.1115/FEDSM2006-98269
From:
  • ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering
  • Volume 1: Symposia, Parts A and B
  • Miami, Florida, USA, July 17–20, 2006
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4750-0 | eISBN: 0-7918-3783-1
  • Copyright © 2006 by ASME

abstract

This paper investigates an isothermal free water jet discharging horizontally from a circular nozzle (9 mm) into a stationary body of water. The jet exit velocity was 2.5 m/s and the exit Reynolds number was 22,500. Particle image velocimetry (PIV) measurements were made at the jet exit and in the far field of the jet. The large-scale structures in the far field were investigated by performing a proper orthogonal decomposition (POD) analysis on the fluctuating velocity fields. The number of modes used for the POD reconstruction of the velocity fields was selected to recover 40% of the turbulent kinetic energy. A vortex identification algorithm was then employed to quantify the size, circulation, and direction of rotation of the exposed vortices. Then, the identified vortex characteristics were analysed by performing a statistical study of their distributions. The results clearly reveal that the jet contains a substantial number of eddies of both rotation directions. Moreover, the number of vortices decreases in the axial direction while their size increases. The mean circulation magnitude is preserved in the axial direction. The results indicate that larger vortices have a higher value of circulation while smaller values of circulation are associated with smaller eddies.

Copyright © 2006 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

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 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