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Lubricants 2018, 6(3), 83; https://doi.org/10.3390/lubricants6030083

Multiscale Modeling Applied to the Hydrodynamic Lubrication of Rough Surfaces for Computation Time Reduction

1
Institut Pprime, CNRS, Université de Poitiers, ISAE-ENSMA, 86962 Futuroscope Chasseneuil, France
2
Institut Pprime, CNRS, Université de Poitiers, ISAE-ENSMA, 16021 Angoulême, France
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 26 July 2018 / Revised: 30 August 2018 / Accepted: 10 September 2018 / Published: 15 September 2018
(This article belongs to the Special Issue Multiphysics and Multiscale Models of Tribology)
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Abstract

This paper presents a multiscale finite element method applied to the simulation of a lubricating film flowing between rough surfaces. The objective of this approach is to study flows between large rough surfaces needing very fine meshes while maintaining a reasonable computation time. For this purpose, the domain is split into a number of subdomains (bottom-scale meshes) connected by a coarse mesh (top-scale). The pressure distribution at the top-scale is used as boundary conditions for the bottom-scale problems. This pressure is adjusted to ensure global mass flow balance between the contiguous subdomains. This multiscale method allows for a significant reduction of the number of operations as well as a satisfactory accuracy of the results if the top-scale mesh is properly fitted to the roughness lateral scale. Furthermore the present method is well-suited to parallel computation, leading to much more significant computation time reduction. View Full-Text
Keywords: rough surfaces; hydrodynamic lubrication; multiscale method; finite element rough surfaces; hydrodynamic lubrication; multiscale method; finite element
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Brunetière, N.; Francisco, A. Multiscale Modeling Applied to the Hydrodynamic Lubrication of Rough Surfaces for Computation Time Reduction. Lubricants 2018, 6, 83.

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