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Effect of Inlet Fluid Temperature on the Buoyancy Induced Flow in Circular Tube Inserted With Twisted Strip

[+] Author Affiliations
S. B. Thombre, S. V. Prayagi, N. V. Deshpande

Nagpur University

Paper No. IMECE2005-82975, pp. 623-625; 3 pages
doi:10.1115/IMECE2005-82975
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part A
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4221-5 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

The present work deals with experimental studies on heat transfer characteristic for buoyancy induced flow through inclined tubes inserted with twisted strips. The parameters varied during the experimetation are; tube inclination, heat supply twist pitch and fluid inlet temperature. It was found that the percentage enhancement in heat transfer coefficient decreases with increase in pitch and tube inclination. The flow rate is found to decrease with decrease in the pitch and increase in the tube inclination. It was also observed that the heat transfer coefficient and flow rate decreases with the increase in the inlet fluid temperature. This may be due to reduction in Rayleigh number caused because of higher heat loss at the tube surface.

Copyright © 2005 by ASME

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