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Design Optimization and Validation of Single-Phase Rectangular Micro Channels With Axial Non-Uniform Width

[+] Author Affiliations
Tijs Van Oevelen, Martine Baelmans

Katholieke Universiteit Leuven, Heverlee, Belgium

Paper No. IHTC14-22429, pp. 49-58; 10 pages
doi:10.1115/IHTC14-22429
From:
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 6
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4941-5 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME

abstract

A simple model for the simulation of the hydraulic behaviour and heat transfer of a single micro channel is formulated, assessed and optimized. The model is based on a thermally developing flow regime. The results of the optimization show that a reduction of 7.8% in thermal resistance can be achieved using non-uniform channels instead of uniform channels. Furthermore, the assumptions of the simple model are validated by comparing the results with a more accurate, numerical model. It is shown that the simple model is sufficiently accurate to simulate the hydraulic and thermal behaviour of micro channels as such. However, the effective improvement of channel width optimization cannot accurately be determined by the analytical models.

Copyright © 2010 by ASME

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