Dynamic Behavior of a Foil in the Presence of a Lubricating Film

[+] Author and Article Information
A. Eshel, M. Wildmann

Ampex Corporation, Redwood City, Calif.

J. Appl. Mech 35(2), 242-247 (Jun 01, 1968) (6 pages) doi:10.1115/1.3601187 History: Received March 08, 1967; Revised November 20, 1967; Online September 14, 2011


Equations for the oscillations of a foil over a lubricating fluid film are derived and are simplified by a small parameter expansion. A few particular cases are discussed, and a linearized solution is obtained for the case of a massless, perfectly flexible foil moving at a speed U over an incompressible film. The solution reveals the interesting phenomenon that small disturbances in the film thickness, as well as symmetrical large disturbances, propagate at a speed U/2.

Copyright © 1968 by ASME
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