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RESEARCH PAPERS

Nonlinear Stability of Film Condensation

[+] Author and Article Information
M. Ünsal

Middle East Technical University, Gaziantep Campus, Gaziantep, Turkey

W. C. Thomas

Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Heat Transfer 102(3), 483-488 (Aug 01, 1980) (6 pages) doi:10.1115/1.3244327 History: Received December 13, 1979; Online October 20, 2009

Abstract

Perturbation methods are used to investigate the nonlinear stability of a vertical condensate film adjacent to quiescent saturated vapor. The analysis presented leads to closed-form expressions for the wave amplification rate and the wave velocity. Application of the results to steam condensation show that supercritically unstable infinitesimal disturbances reach finite equilibrium amplitudes while subcritically stable finite-amplitude wave motion is not possible. The nondimensional parameters which affect the supercritically-stable finite-amplitude wave motion are identified and the effects on the stability of the condensate film are discussed.

Copyright © 1980 by ASME
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