Moving textures: Simulation of a ring sliding on a textured liner

Author(s)

Checo, Hugo M. ^[1] ; Ausas, Roberto F. ^[1] ; Jai, Mohammed ^[2] ; Cadalen, Jean-Paul ^[3] ; Choukroun, Franck ^[3] ; Buscaglia, Gustavo C. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Ciencias Matemat & Comp, BR-13560970 Sao Carlos, SP - Brazil

^[2] INSA Lyon Pole Math, ICJ, F-69621 Villeurbanne - France

^[3] RENAULT, F-92508 Rueil Malmaison - France

• Document type: Journal article
• Source: TRIBOLOGY INTERNATIONAL; v. 72, p. 131-142, APR 2014.
• Web of Science Citations: 40

Abstract

Numerical simulations of the ring/liner contact in which the liner exhibits a periodic texture (pockets) are reported. The mass-conservative Elrod-Adams model is used to treat cavitation, and the dynamics of the ring is considered with a linear mass that corresponds to actual engine compression rings. The results, computed at a Siribeck number of 10(-3) and thus in the hydrodynamic lubrication regime, show that the ring profile determines whether pocketing is beneficial or not. For strongly non-conformal contacts pocketing is detrimental, but for quasi-conformal contacts friction reductions of up to 73% are predicted. The largest reduction in friction was obtained for textures consisting of close-packed arrays of circular pockets of diameter comparable to the size of the contact. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 12/14481-8 - Numerical approximation of microfluidic interfaces with mechano-bio-chemical coupling
• Grantee: Gustavo Carlos Buscaglia
• 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