A slider bearing pad of length slides over a flat surface at

PHYSICS · Multi-part · Fermi University Physics · Fluids & Continuum Physics · Viscous flow and dynamical similarity · Viscous flow and dynamical similarity

Fluid Dynamics, Ch Stokes flow, lubrication and viscous wetting

Problem

A slider bearing pad of length L=4.0 cmL=4.0\,\mathrm{cm} slides over a flat surface at U=2.0 m s−1U=2.0\,\mathrm{m\,s^{-1}}, separated from it by an oil film of viscosity μ=0.030 Pa s\mu=0.030\,\mathrm{Pa\,s} and exit thickness h2=15 μmh_2=15\,\mu\mathrm{m}. ((a)) Find the ratio L/h2L/h_2. ((b)) Estimate the scale of the pressure generated in the film, p∼μUL/h22p \sim \mu UL/h_2^2.

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