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RESEARCH PAPERS

Effects of Gravity and Surface Tension Upon Liquid Jets Leaving Poiseuille Tubes

[+] Author and Article Information
J. H. Lienhard

University of Kentucky, Lexington, Ky.

J. Basic Eng 90(2), 262-268 (Jun 01, 1968) (7 pages) doi:10.1115/1.3605087 History: Received February 02, 1968; Online November 03, 2011

Abstract

A method is developed for approximating the transverse velocity component in the incompressible two-dimensional boundary layer equations. The method is restricted to flows that are symmetrical in the transverse coordinate, and it facilitates easy numerical integration in such problems as the prediction of jet and wake flows. The prediction of velocity profiles and diameters for free exiting Poiseuille flows, under the influence of both gravity and surface tension, is then undertaken. Analytical results obtained by the present method are found to agree very closely with experiments. The experiments also show that, in low Weber number situations, contact angle at the exit plane can dominate the early relaxation of the exit profile.

Copyright © 1968 by ASME
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