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Numerical Model of Hydrodynamic Lubrication Process

Numerical model for calculating hydrodynamic lubrication process under the thin-film approximation is presented in this study. Hydrodynamic lubrication is obtained between two surfaces in relative motion completely separated by a cohesive film or lubricant. There are several requirements for lubrication regime to be hydrodynamic: lubricant has to be supplied in sufficient quantity, there should be no aeration or abrasive particles between surfaces, film should be thicker at the inlet than at the outlet, etc. In order to simulate hydrodynamic lubrication process the Reynolds lubrication equation is used. It is an elliptic partial differential equation which defines hydrodynamic pressure in a thin liquid film between two closely spaced moving surfaces. Finite Area Method, a surface counterpart of the Finite Volume Method, is used to discretize Reynolds lubrication equation over a curved surface mesh. Numerical model is implemented in OpenFOAM and validated by calculating hydrodynamic lubrication process in journal bearings.

Hydrodynamic Lubrication ; Finite Area Method ; Reynolds Lubrication Equation ; OpenFOAM

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