Two-Phase Flow Through Square and Circular Microchannels—Effects of Channel Geometry

[+] Author and Article Information
Peter M.-Y. Chung, Masahiro Kawaji

Dept. of Chemical Engineering & Applied Chemistry, University of Toronto, Toronto, Ontario, Canada

Akimaro Kawahara

Dept. of Mechanical Engineering & Materials Science, Kumamoto University, Kumamoto, Kyushu, Japan

Yuichi Shibata

Dept. of Mechanical Engineering, Ibaraki National College of Technology, Hitachinaka-shi, Ibaraki-ken, Japan

J. Fluids Eng 126(4), 546-552 (Sep 10, 2004) (7 pages) doi:10.1115/1.1777227 History: Received May 27, 2003; Revised March 17, 2004; Online September 10, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
Volume-averaged void fraction (○ from experiment; —— from Eq. (3) with C1=0.03, C2=0.97; ⋅ ⋅ ⋅ ⋅ ⋅ for homogeneous flow; - - - - - from Ali et al. 16)
Grahic Jump Location
Prediction of the two-phase frictional pressure gradient in the (a) 96 μm square channel and (b) 100 μm circular channel. The C-value in the Lockhart-Martinelli correlation (Eq. 4) is averaged from experiment.
Grahic Jump Location
Experimental apparatus and test section
Grahic Jump Location
Flow patterns in the square and circular microchannels under similar flow conditions
Grahic Jump Location
Two-phase flow pattern maps using flow pattern definitions for microchannels (□ slug-ring; ○ ring-slug; ▿ multiple; ⋄ semi-annular; —— transition lines)



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