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RESEARCH PAPERS

Heat Transfer in Gas-Solids Drag-Reducing Flow

[+] Author and Article Information
R. S. Kane

Mechanical Engineering Department, Manhattan College, Riverdale, NY 10471

R. Pfeffer

Chemical Engineering Department, City College of New York, New York, NY 10031

J. Heat Transfer 107(3), 570-574 (Aug 01, 1985) (5 pages) doi:10.1115/1.3247462 History: Received February 21, 1984; Online October 20, 2009

Abstract

Heat transfer coefficients of air-glass, argon-glass, and argon-aluminum suspensions were measured in horizontal and vertical tubes. The glass, 21.6 and 36.0-μ-dia particles, was suspended at gas Reynolds numbers between 11,000 and 21,000 and loading ratios between 0 and 2.5. The presence of particles generally reduced the heat transfer coefficient. The circulation of aluminum powder in. the 0.870-in.-dia closed loop system produced tenacious deposits on protuberances into the stream. In the vertical test section, the Nusselt number reduction was attributed to viscous sublayer thickening; in the horizontal test section to particle deposition.

Copyright © 1985 by ASME
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