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RESEARCH PAPERS

Numerical Investigations Into the Mechanisms of Microbubble Drag Reduction

[+] Author and Article Information
N. K. Madavan, C. L. Merkle

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

S. Deutsch

Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16802

J. Fluids Eng 107(3), 370-377 (Sep 01, 1985) (8 pages) doi:10.1115/1.3242495 History: Received December 08, 1983; Online October 26, 2009

Abstract

Computational results of an initial attempt to model the phenomenon of skin-friction reduction by microbubble injection are presented. A well-tested boundary-layer code employing a simple mixing length model for the turbulence is used. The action of the bubbles is simulated by allowing the viscosity and density to vary locally as a function of a prescribed bubble concentration profile. Parametric studies of bubble location in the boundary layer, peak concentration and mixture viscosity model are performed. The order of magnitude and trends of the experimental skin-friction reduction are reproduced quite well by this simple model.

Copyright © 1985 by ASME
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