Recent models for laminar friction and heat transfer in non-circular ducts and channels are reviewed. Models for both hydrodynamically and thermally developing flows are presented. These models are based on the superposition of asymptotic characteristics for short and long ducts. The non-dimensional mean wall shear stress (or fRe) and non-dimensional heat transfer coefficient (or Nusselt number) are shown to be only functions the dimensionless hydrodynamic or thermal duct length, respectively, and the duct aspect ratio. This is achieved by means of using a new transversal length scale, the square root of cross-sectional area, rather than the hydraulic diameter. Additional definitions more appropriate to single fluid devices such as heat sinks are also discussed.
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ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels
June 19–22, 2011
Edmonton, Alberta, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4464-9
PROCEEDINGS PAPER
Generalized Models for Laminar Developing Flows in Heat Sinks and Heat Exchangers Available to Purchase
Y. S. Muzychka
Y. S. Muzychka
Memorial University of Newfoundland, St. John’s, NL, Canada
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Y. S. Muzychka
Memorial University of Newfoundland, St. John’s, NL, Canada
Paper No:
ICNMM2011-58294, pp. 615-628; 14 pages
Published Online:
May 11, 2012
Citation
Muzychka, YS. "Generalized Models for Laminar Developing Flows in Heat Sinks and Heat Exchangers." Proceedings of the ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 2. Edmonton, Alberta, Canada. June 19–22, 2011. pp. 615-628. ASME. https://doi.org/10.1115/ICNMM2011-58294
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