Forced Convection in Concentric-Sphere Heat Exchangers

[+] Author and Article Information
H. A. Rundell

Texaco Research Laboratory, Bellaire, Texas

E. G. Ward, J. E. Cox

Department of Mechanical Engineering, University of Houston, Houston, Texas

J. Heat Transfer 90(1), 125-129 (Feb 01, 1968) (5 pages) doi:10.1115/1.3597441 History: Received March 14, 1967; Online August 25, 2011


The first experimental investigation of forced convection of a fluid through the annulus formed by two concentric spheres was performed. The fluid enters and leaves the annulus through diametrically opposed openings in the outer sphere. The inner sphere serves as a constant-temperature heat source. Four sphere-size combinations were tested. The flow patterns in the annulus were established by flow visualization techniques; characteristic photographic results are presented. Energy considerations include heat transfer rates, inner-sphere surface temperatures, and temperature traverses of the coolant fluid. An empirical relation correlates the heat transfer data.

Copyright © 1968 by ASME
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