Study on Flow Friction Experimental Characteristics in Narrow Annuli

Abstract:

Fluid friction characteristics were experimented and studied on four group narrow annuli with the gap size ranging from 0.50 mm to 2.5 mm which are composed of copper tube and PVC pipe, and distilled water used as working fluid in the experiment. The experimental results show comparing with circular pipe, the narrow annuli advance the Reynolds number from the laminar to the rapids and friction factor goes down with decrease of the gap size. It w as found that the critical gap size of the conventional annuli size and the narrow annuli approximately is 2.5 mm, friction factor increased with the increase of the gap size when the gap is smaller than 2.5 mm.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 407-410
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.407
• Online since: November 2011
• Authors: Yue Qiu Sun, Shao Feng Yan, Qi Mei Gao
• Keywords: Friction Coefficient (FC), Heat Transfer Coefficient (HTC), Micro-Channel, Reynolds Number

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