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TECHNICAL PAPERS: Micro/Nanoscale Heat Transfer

Thermal Characteristics of Microscale Fractal-Like Branching Channels

[+] Author and Article Information
Ali Y. Alharbi

Department of Mechanical Power and Refrigeration, PAAET College of Technological Studies, P.O. Box 42325, Shuwaikh, Kuwait 70654e-mail: aalharbi@paaetms.paaet.edu.kw

Deborah V. Pence

Department of Mechanical Engineering, Oregon State University, 204 Rogers Hall, Corvallis, OR 97331-6001e-mail: pence@engr.orst.edu

Rebecca N. Cullion

Department of Mechanical Engineering, Oregon State University, 204 Rogers Hall, Corvallis, OR 97331-6001e-mail: cullion@engr.orst.edu

J. Heat Transfer 126(5), 744-752 (Nov 16, 2004) (9 pages) doi:10.1115/1.1795236 History: Received September 04, 2003; Revised June 11, 2004; Online November 16, 2004
Copyright © 2004 by ASME
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References

Figures

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Fractal-like branching channel network (Shaded path, known hereafter as path 1, includes branches k=0,k=1,k=2b,k=3c,k=4f)
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Local coordinate system for the k=3c branch. Note that z is always out of the page and that channel k=3d is tapered.
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One-dimensional and three-dimensional inner wall temperature distributions for fractal-like and straight-channel networks with constant properties
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Wall surface temperatures along path 1
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Temperature contours in x-y plane at intersection of k=2b and k=3c branches
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Wall surface temperatures along path 2
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Spanwise temperature profiles at x=0 and z=0.5 for all branches along path 1
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Spanwise temperature profiles at x=1 and z=0.5 for all branches along path 1
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Temperature contours in x-z plane at inlet of k=1 branch
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Spanwise and transverse component velocity vectors at a) inlet and b) midstream location of k=1 branch
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Spanwise and transverse component velocity vectors at a) inlet and b) midstream location of k=2b branch
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Three-dimensional CFD stream-wise temperature distributions along inner wall of path 1 with constant and variable fluid properties
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Surface temperature distribution on heated surface of heat sink with fractal-like flow network; localized hot spots at symmetry plane near r/R=0.4
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Radial and axial heat surface temperatures along the symmetry plane of heat sinks with fractal-like and straight, parallel channel arrays, respectively

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