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Effects of Repeating Microstructures on Pressure Drop in Rectangular Minichannels

[+] Author Affiliations
Derek J. Schmitt, Satish G. Kandlikar

Rochester Institute of Technology, Rochester, NY

Paper No. ICMM2005-75111, pp. 281-289; 9 pages
doi:10.1115/ICMM2005-75111
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

A literature review in laminar incompressible flow in microchannels has shown both early and late transitions from laminar to turbulent flow as well as no deviation from the conventional flow transition of Re = 2300. In the present work, air and water flow through rectangular channels with hydraulic diameters ranging from 325∝m to 1819∝m. Smooth surface conditions are tested to validate the test section, while a repeating roughness is used to show the effects of surface roughness and its orientation on flow characteristics in minichannels. Testing has shown that smooth channels show no deviation, while artificially roughened channels show considerable deviation from the macroscale flow transition of Re = 2300.

Copyright © 2005 by ASME

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