Technical Briefs

Liquid Single-Phase Flow in an Array of Micro-Pin-Fins—Part II: Pressure Drop Characteristics

[+] Author and Article Information
Weilin Qu1

Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, HI 96822qu@hawaii.edu

Abel Siu-Ho

Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, HI 96822


Corresponding author.

J. Heat Transfer 130(12), 124501 (Sep 17, 2008) (4 pages) doi:10.1115/1.2970082 History: Received September 11, 2007; Revised May 01, 2008; Published September 17, 2008

This Technical Brief is Part II of a two-part study concerning water single-phase pressure drop and heat transfer in an array of staggered micro-pin-fins. This brief reports the pressure drop results. Both adiabatic and diabatic tests were conducted. Six previous friction factor correlations for low Reynolds number (Re<1000) flow in conventional and micro-pin-fin arrays were examined and found underpredicting the adiabatic data except the correlation by Short (2002, “Performance of Pin Fin Cast Aluminum Coldwalls, Part 1: Friction Factor Correlation  ,” J. Thermophys. Heat Transfer, 16(3), pp. 389–396), which overpredicts the data. A new power-law type of correlation was developed, which showed good agreement with both adiabatic and diabatic data.

Copyright © 2008 by American Society of Mechanical Engineers
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Figure 1

Test module construction

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Figure 2

Top view of the micro-pin-fin array and schematic of the streamwise segment

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Figure 3

Comparison of the fraction factor data with predictions of correlations for adiabatic tests

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Figure 4

Comparison of the measured diabatic pressure drop data with predictions of correlation 7




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