Full Content is available to subscribers

Subscribe/Learn More  >

Optimum Rib-to-Rib Spacing to Enhance Forced Convection in the Triangular Duct With Ribbed Inner Surfaces

[+] Author Affiliations
D. D. Luo, C. W. Leung, T. L. Chan

Hong Kong Polytechnic University, Kowloon, Hong Kong

Paper No. IMECE2003-41744, pp. 233-238; 6 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 4
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3718-1 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


An experimental investigation had been conducted on the forced convection of a fully developed turbulent flow in an air-cooled horizontal equilateral triangular duct. Uniformly spaced square ribs of the same size of 7.9mm were fixed on the triangular duct’s inner surfaces, orthogonal to the mean airflow. Effects of rib-to-rib spacing on the thermal performance of the duct had been studied and an optimum spacing was found corresponding to the maximum convection heat transfer. In the current study, the considered experimental triangular ducts of the same length and hydraulic diameter were fabricated with duralumin. The entire wall of the ducts was heated uniformly, while the outer wall was thermally insulated. The investigation had been conducted over a wide range of hydraulic diameter based Reynolds numbers (i.e. from 4,000 to 23,000). Nondimensional correlations for the determination of the heat transfer coefficients for such a thermal system had been developed from the experimental results.

Copyright © 2003 by ASME



Interactive Graphics


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

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