Effects of Fluid Inertial Forces on Viscoelastic Squeeze Film Characteristics.

Abstract

This paper describes the effects of fluid inertial forces on viscoelastic squeeze film chracteristics. In the derivation of the modified Reynolds equation, the nonlinear Maxwell model combining the Rabinowitsch model and Maxwell model is used as a constitutive equation for the viscoelastic lubrication film, and the inertial term in the momentum equation is approximated by the mean value averaged over the film thickness. Applying the modified Reynolds equation to a parallel circular bearing with sinusoidal squeezing motion, the variation of pressure distribution with time is calculated numerically for various kinds of fluids such as Newtonian, pseudoplastic, linear Maxwell and nonlinear Maxwell fluids. Some numerical results are presented in graphic form, and the effects of inertial force on the viscoelastic squeeze film characteristics are discussed.