Simplified Analysis of Air-Bubble Plumes in Moderately Stratified Environments

[+] Author and Article Information
N. A. Hussain, B. S. Narang

College of Engineering, San Diego State University, San Diego, Calif. 92182

J. Heat Transfer 106(3), 543-551 (Aug 01, 1984) (9 pages) doi:10.1115/1.3246713 History: Received August 29, 1983; Online October 20, 2009


This paper is concerned with the behavior of buoyant plumes driven by rising gas bubbles through a moderately stratified liquid environment. A two-phase mathematical model is proposed for calculating the induced turbulent vertical liquid flow and its temperature. Simultaneous numerical solutions of the continuity, momentum, and energy equations are obtained for the two cases of an axisymmetric and a two-dimensional air jet submerged in water. Water pumping rates, liquid velocities, plume radii (widths), and temperatures are obtained as a function of air flow rates, depth of submergence, and the assumed temperature profile of the water in the region far away from the jet. Effects of temperature stratification in the liquid region far away from the jet resulted in increased liquid flow rates as well as increased plume cross-section areas. Comparisons are made with the experimental information available in the literature.

Copyright © 1984 by ASME
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