0
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
Your Session has timed out. Please sign back in to continue.

References

Tuckerman,  D. B., and Pease,  R. F. W., 1981, “High-Performance Heat Sinking for VLSI,” IEEE Electron Device Lett., EDl-2(5), pp. 126–277.
Sohban,  B. S., and Garimella,  S. V., 2001, “A Comparative Analysis of Studies on Heat Transfer and Fluid Flow in Microchannels,” Microscale Thermophys. Eng., 5, pp. 293–311.
Garimella, S. V., and Singhal, V., 2003, “Single-Phase Flow and Heat Transport in Microchannel Heat Sinks,” Proc. of First International Conference on Microchannels and Minichannels, Rochester, NY, pp. 159–169.
Bau,  H. H., 1998, “Optimization of Conduits’ Shape in Micro Heat Exchangers,” Int. J. Heat Mass Transfer, 41, pp. 2717–2723.
Pence, D. V., 2000, “Improved Thermal Efficiency and Temperature Uniformity Using Fractal-Like Branching Channel Networks,” Proc. International Conference on Heat Transfer and Transport Phenomena in Microscale, Banff, Canada, pp. 142–148.
West,  G. B., Brown,  J. H., and Enquist,  B. J., 1997, “A General Model for the Origin of Allometric Scaling Laws in Biology,” Science, 276, pp. 122–126.
Bejan,  A., 1997, “Constructal Tree Network for Fluid Flow Between a Finite-Size Volume and One Source or Sink,” Rev. Gen. Therm., 36, pp. 592–604.
Pence,  D. V., 2002, “Reduced Pumping Power and Wall Temperature in Microchannel Heat Sinks With Fractal-Like Branching Channel Networks,” Microscale Thermophys. Eng., 6(4), pp. 319–330.
Chen,  Y., and Cheng,  P., 2002, “Heat Transfer and Pressure Drop in Fractal Tree-Like Microchannel Nets,” Int. J. Heat Mass Transfer, 45, pp. 2643–2648.
Wechsatol,  W., Lorente,  S., and Bejan,  A., 2002, “Optimal Tree-Shaped Networks for Fluid Flow in a Disc-Shaped Body,” Int. J. Heat Mass Transfer, 45, pp. 4911–4294.
White, F. M., 1991, Viscous Fluid Flow, McGraw-Hill, New York.
Wibulswas, P., 1966, “Laminar Flow Heat Transfer in Non-Circular Ducts,” Ph.D. dissertation, University of London.
Shah,  R. K., and London,  A. L., 1978, “Laminar Flow Forced Convection in Ducts,” Adv. Heat Trans, Supplement 1, pp. 219–222.
Alharbi, A. Y., Pence, D. V., and Cullion, R. N., 2003, “Fluid Flow Through Microscale Fractal-Like Branching Channel Networks,” ASME J. Fluids Eng., 125(6), pp. 1051–1057.
Pence,  D. V., Bouschouten,  B. P., and Liburdy,  J. A., 2003, “Simulation of Micro-Scale Jet Impingement Heat Transfer,” ASME J. Heat Transfer, 125(3), pp. 447–453.

Figures

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

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In