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Numerical solution of elastohydrodynamic lubrication with non-newtonian fluid flow

Bahari, Adli (2010) Numerical solution of elastohydrodynamic lubrication with non-newtonian fluid flow. Masters thesis, Universiti Teknologi Malaysia, Faculty of Mechanical Engineering.

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Abstract

In this project, a line contact elastohydrodynamic lubrication is modelled through an infinite cylinder on a plane to represent the application of roller bearing. The numerical solution of this problem is presented embedded with free volume model of pressure-viscosity equation using Doolittle-Tait model. Newton-Raphson method is used to solve the Reynolds equation simultaneously with pressureviscosity equation and elastic deformation in order to find the pressure profile and film thickness. The behavior of non-Newtonian fluid also was investigated using power law fluid model. The bearing performances parameters such as pressure, film thickness and friction coefficient of lubricated contacts are calculated. Non-uniform grid also used to improve the pressure spike stability. The results show that the peak pressure increases as the parameters such as velocity, load, material parameter and power law index are increases and the spike is found to shift to the center of roller. The coefficient of friction is reduced as the power law index and slide to roll ratio are decreased.

Item Type:Thesis (Masters)
Additional Information:Thesis (Sarjana Kejuruteraan Mekanikal) - Universiti Teknologi Malaysia, 2010; Supervisor : Assoc. Prof. Dr. Kahar bin Osman & Mr Zubil bin Bahak
Uncontrolled Keywords:elastohydrodynamic lubrication, infinite cylinder, plane, numerical solution
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:11055
Deposited By: Ms Zalinda Shuratman
Deposited On:24 Nov 2010 05:52
Last Modified:02 Jul 2012 06:44

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