Squeeze Film Damping of Non-Newtonian Fluids

[+] Author and Article Information
J. Shah

Department of Medical Engineering, The General Hospital, Southampton, England

J. B. Hunt

Department of Mechanical Engineering, The University of Southampton, Southampton, England

J. of Lubrication Tech 101(4), 516-519 (Oct 01, 1979) (4 pages) doi:10.1115/1.3453404 History: Received March 23, 1979; Online October 20, 2010


In order to determine the overall dynamic response of a machine to a forcing function the damping effect of the bearings in the machine must be known. The damping effect of oil lubricated bearings has been widely published, but the squeeze film damping effect of grease lubricated bearings has hitherto been unestablished. It has been assumed in the past that the grease can be treated as a Newtonian fluid with a viscosity equal to that of the base oil. This assumption is shown to produce damping coefficients which overestimate the actual damping coefficient by up to a factor of 7.

Copyright © 1979 by ASME
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