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  4. A scaling parameter for pressure losses and thermal effects in lubricant flows with viscous dissipation
 
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2017
Journal Article
Title

A scaling parameter for pressure losses and thermal effects in lubricant flows with viscous dissipation

Abstract
The shearing of compressible fluids in a channel with parallel walls is studied to understand the impact of viscous dissipation and thermodynamics in thin lubricant films. Numerical simulations based on the compressible Navier-Stokes equations and Reynolds equation, both coupled with the energy equation, are performed for a lubricant oil. Particular attention is paid to the resulting pressure losses in the plane channel. It is shown that viscous effects, that alter the classical Couette velocity profile towards a Couette-Poiseuille one, scale with the parameter x=m0Ul/(h2Pref)x=m0Ul/(h2Pref), and that the pressure losses are proportional to the square of x.
Author(s)
Codrignani, A.
Savio, D.
Magagnato, F.
Frohnapfel, B.
Journal
Tribology international  
DOI
10.1016/j.triboint.2016.12.007
Language
English
Fraunhofer-Institut für Werkstoffmechanik IWM  
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