The effects of rib-patterned surfaces on laminar, transitional to turbulent gas flow in micro-channels were experimentally investigated in the present study. The experiments were performed for two micro-channels having either smooth or rib-patterned surfaces. The micro-channels were etched into silicon wafers and capped with glass substrates. The micro-ribs were patterned on the microchannel surfaces and oriented perpendicular to the flow direction. The pressure was measured at seven locations along the channel length to determine local values of Mach number and friction factor for a wide range of flow regime from laminar to turbulent flow. The friction factors with the hydraulic diameter based on the rib-to-upper-wall height were compared with that for incompressible theory on Moody chart. The values of the product of friction factor and Reynolds number (f·Re) as a function of Mach number were also compared with those of smooth micro-channels and incompressible theory.
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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:
978-0-7918-4463-2
PROCEEDINGS PAPER
Experimental Investigations of Laminar, Transitional to Turbulent Gas Flow in Rib-Patterned Micro-Channels
Chungpyo Hong,
Chungpyo Hong
Tokyo University of Science, Noda, Chiba, Japan
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Toru Yamada,
Toru Yamada
University of Rhode Island, Kingston, RI
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Yutaka Asako,
Yutaka Asako
Tokyo Metropolitan University, Hachioji, Tokyo, Japan
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Mohammad Faghri,
Mohammad Faghri
University of Rhode Island, Kingston, RI
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Ichiro Ueno
Ichiro Ueno
Tokyo University of Science, Noda, Chiba, Japa
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Chungpyo Hong
Tokyo University of Science, Noda, Chiba, Japan
Toru Yamada
University of Rhode Island, Kingston, RI
Yutaka Asako
Tokyo Metropolitan University, Hachioji, Tokyo, Japan
Mohammad Faghri
University of Rhode Island, Kingston, RI
Ichiro Ueno
Tokyo University of Science, Noda, Chiba, Japa
Paper No:
ICNMM2011-58100, pp. 327-334; 8 pages
Published Online:
May 11, 2012
Citation
Hong, C, Yamada, T, Asako, Y, Faghri, M, & Ueno, I. "Experimental Investigations of Laminar, Transitional to Turbulent Gas Flow in Rib-Patterned Micro-Channels." Proceedings of the ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 1. Edmonton, Alberta, Canada. June 19–22, 2011. pp. 327-334. ASME. https://doi.org/10.1115/ICNMM2011-58100
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