IEEE Transactions on Components, Packaging and Manufacturing Technology
-Part. A, Vol. 20, No. 2, pp. 138-145, June 1997.

Heat Transfer from Micro-Finned Surfaces to Flow of Fluorinert Coolant in Reduced-Size Channels

Hitoshi Mizunuma, Masud Behnia, and Wataru Nakayama, Senior Member,IEEE


Experiments were conducted in order to investigate the forced convective heat transfer from a micro-finned surface to a fluorocarbon liquid FX3250.The heat transfer surface is made from copper, has a base area 2 x 2 cm2, and is equipped with 20 longitudinal fins, each fin being 0.5mm high and 0.5mm wide.Particular attention was directed to the effect of the channel height (H) on the heat transfer performance, changing H from 1 to 3 mm.The Reynolds number based on the hydraulic diameter covered a range from 1000 to 12000.Also conducted was an experiment using a flat heat transfer surface.It was found that the sensitivity of heat transfer performance to the change of H depends on the type of heat transfer surface.Comparisons are presented in terms of the heat transfer coefficient based on the actual heat transfer area.

In order to interpret the experimental data the numerical simulation of flow and heat transfer was performed.The results render support to the heuristic assumption that the increased flow velocity in the free flow area above the fins in higher-height channels yield high heat transfer coefficients on the fin tips, offsetting the degradation of heat transfer in the grooves.

© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

[Home Page][Articles Page]