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Surface wave and thermocapillary instabilities in a liquid film flow

Published online by Cambridge University Press:  26 April 2006

D. A. Goussis
Affiliation:
Mechanical, Aerospace, and Nuclear Engineering Department, University of California, Los Angeles, Los Angeles, CA 90024, USA Present address: Mechanical and Aerospace Engineering Department, Princeton University, Princeton, NJ 08544, USA.
R. E. Kelly
Affiliation:
Mechanical, Aerospace, and Nuclear Engineering Department, University of California, Los Angeles, Los Angeles, CA 90024, USA

Abstract

A liquid film flowing down an inclined heated plane subject to surface wave and thermocapillary instabilities is studied. Three mechanisms exist by which energy can be transferred to the disturbance. Two of these mechanisms are associated with the thermocapillary forces and one with the shear stress of the basic flow at the deformed free surface. Depending on which mechanism is dominant, the instability can assume the form of either long transverse waves or short longitudinal rolls.

Type
Research Article
Copyright
© 1991 Cambridge University Press

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