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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The lubrication approximation of the friction force for the simulation of measured surfaces

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Checo, Hugo M. [1] ; Jaramillo, Alfredo [1] ; Ausas, Roberto F. [1] ; Buscaglia, Gustavo C. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Ciencias Matemat & Computacao, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: TRIBOLOGY INTERNATIONAL; v. 97, p. 390-399, MAY 2016.
Web of Science Citations: 9

Models of the friction force are assessed by direct comparison with two-dimensional Navier-Stokes results. A three-term formula obtained from asymptotic expansion provides a reasonable estimate of the hydrodynamic friction of rough runners even at sub-micron clearances. Simulations of a measured honed surface are then reported using the conservative time-dependent Elrod-Adams model with spatial resolutions as fine as 0.25 mu m per cell (4000 x 800 mesh). Mesh convergence of the numerical method is observed. Cell sizes between 0.5 mu m and 1 mu m appear as a reasonable compromise of accuracy and cost for the simulation of honed runners. The significance of each term of the friction formula is discussed, so as to assess the error involved in neglecting terms of the friction formula. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 14/19249-1 - Computational fluid dynamics of Complex Interfaces: applications to the study of emulsions and the Micromechanics of biological membranes
Grantee:Roberto Federico Ausas
Support Opportunities: Regular Research Grants
FAPESP's process: 11/24147-5 - Advanced computational methods for the simulation of lubrified contacts
Grantee:Hugo Marcial Checo Silva
Support Opportunities: Scholarships in Brazil - Doctorate