Journal
PHYSICS OF FLUIDS
Volume 15, Issue 3, Pages 653-661Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1538612
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The friction factor of a water laminar flow through fused silica microtubes with diameters ranging from 50 to 530 mum is investigated experimentally. The existing works in the literature are analyzed. They show a range of experimental results which agree or not with the conventional theory. Pressure drops and flowing masses are measured to determine the flow characteristics using a transient method. Several experiments are developed for two fluids (distilled and tap water) and tube compositions. The experimental results are discussed. The disparity from the classical theory is found to be due to the fluid's ionic composition. The experimental results for tap water and classical fused silica surfaces indicate a disparity from the conventional theory. A friction factor increase with small uncertainties (<5%) is observed for decreasing diameters. (C) 2003 American Institute of Physics.
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