Abstract
In this paper we examine the question of whether the viscoelastic properties of multigrade oils can have a measurable effect on the performance of dynamically loaded journal bearings. Our investigation takes the form of a computational study in which the full set of coupled equations (kinematic and constitutive) governing the flow of the lubricant is solved using a moving spectral element method. The problem is formulated in terms of velocity, pressure and extrastress and the weak formulation of the system of equations is used as the basis of the discretization. The lubricant is modelled using the Phan-Thien Tanner and White-Metzner models, in the latter of which both the viscosity and the relaxation time are functions of shear-rate and pressure. An arbitrary Lagrangian-Eulerian (ALE) method is used to evolve the computational mesh in time.
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Gwynllyw, D.R., Phillips, T.N. (2006). The Effect of Viscoelasticity on the Performance of Journal Bearings. In: Snidle, R.W., Evans, H.P. (eds) IUTAM Symposium on Elastohydrodynamics and Micro-elastohydrodynamics. Solid Mechanics and Its Applications, vol 134. Springer, Dordrecht . https://doi.org/10.1007/1-4020-4533-6_12
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DOI: https://doi.org/10.1007/1-4020-4533-6_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4532-5
Online ISBN: 978-1-4020-4533-2
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