Mixed Convective Low Flow Pressure Drop in Vertical Rod Assemblies: II—Experimental Validation

[+] Author and Article Information
K. Y. Suh, N. E. Todreas, W. M. Rohsenow

Departments of Nuclear and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Heat Transfer 111(4), 966-973 (Nov 01, 1989) (8 pages) doi:10.1115/1.3250812 History: Received May 16, 1988; Revised January 18, 1989; Online October 20, 2009


An experimental study has been conducted to validate the predictive models and correlations for laminar and transition flow frictional pressure loss in vertical rod bundles under mixed convection conditions. An experimental procedure has been developed to measure low differential pressures under mixed convection conditions in 19 heated rod bare and wire-wrapped assemblies. The proposed model has been found successfully to predict the effects of wire wrapping, power skew, transition from laminar regime, developing and Interacting flow redistributions, and rod number on the friction loss characteristics in bundle geometries over the bundle average Grq /Re number range of 6 to 18,500.

Copyright © 1989 by ASME
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