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RESEARCH PAPERS

Gas-Liquid Bubbly Flow in Vertical Pipes

[+] Author and Article Information
V. E. Nakoryakov, O. N. Kashinsky, V. V. Randin, L. S. Timkin

Russian Academy of Sciences, Siberian Branch, Institute of Thermophysics, Lavrentyev Av., 1, 630090, Novosibirsk, Russia

J. Fluids Eng 118(2), 377-382 (Jun 01, 1996) (6 pages) doi:10.1115/1.2817389 History: Received August 26, 1994; Revised August 23, 1995; Online December 04, 2007

Abstract

Gas-liquid bubbly flow was investigated in vertical pipes for different flow conditions: fully developed turbulent downward flow in a 42.3 mm diameter pipe and upward flow in a 14.8 mm diameter pipe with liquid of elevated viscosity. Wall shear stress, local void fraction, and liquid velocity profiles, shear stress, and velocity fluctuations were measured using an electrodiffusional method. Results obtained demonstrate the existence of “universal” near-wall velocity distribution in a downward bubbly flow. The reduction of turbulent fluctuations is observed in downward flow as compared to a single-phase turbulent flow. The development of bubble-induced liquid velocity fluctuations in a “laminar” bubbly flow was studied.

Copyright © 1996 by The American Society of Mechanical Engineers
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