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RESEARCH PAPERS: Micro/Nanoscale Heat Transfer

Mixed Convection in a Vertical Parallel Plate Microchannel

[+] Author and Article Information
Mete Avcı

Department of Mechanical Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey

Orhan Aydın1

Department of Mechanical Engineering, Karadeniz Technical University, 61080 Trabzon, Turkeyoaydin@ktu.edu.tr

1

Corresponding author.

J. Heat Transfer 129(2), 162-166 (Apr 19, 2006) (5 pages) doi:10.1115/1.2422741 History: Received February 16, 2006; Revised April 19, 2006

In this study, fully developed mixed convective heat transfer of a Newtonian fluid in an open-ended vertical parallel plate microchannel is analytically investigated by taking the velocity slip and the temperature jump at the wall into account. The effects of the mixed convection parameter, Gr/Re, the Knudsen number, Kn, and the ratio of wall temperature difference, rT, on the microchannel hydrodynamic and thermal behaviors are determined. Finally, a Nu=f(GrRe,Kn,rT) expression is developed.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Schematic diagram of the flow domain

Grahic Jump Location
Figure 2

Velocity distribution as a function Gr/Re for Kn=0 and rT=0

Grahic Jump Location
Figure 3

Velocity distribution as a function rT for Kn=0 and Gr∕Re=100

Grahic Jump Location
Figure 4

Velocity distribution as a function Kn for rT=0.5 and Gr∕Re=100

Grahic Jump Location
Figure 5

Temperature distribution as a function Kn and rT

Grahic Jump Location
Figure 6

The variation of the Nu with Kn at different values of Gr/Re (a) and rT (b)

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