Journal
TRIBOLOGY LETTERS
Volume 56, Issue 2, Pages 281-292Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-014-0408-y
Keywords
Ferrofluid; Point contact; Elastohydrodynamic lubrication; Friction coefficient; Magnetorheology
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Funding
- MINECO (Spain) [MAT 2010-15101, MAT 2013-44429-R]
- European Regional Development Fund (ERDF)
- Junta de Andalucia (Spain) [P10-RNM-6630, P11-FQM-7074]
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This paper demonstrates a new route to control friction in the isoviscous elastic lubrication regime between compliant point contacts. For this aim, the superposition of non-homogeneous magnetic fields in ferrofluid lubricated contacts is proposed. Under appropriate conditions, a friction reduction is observed by simply displacing the magnetic field distribution in the flow direction towards the inlet of the contact. This friction reduction is associated with a lower Couette friction contribution as a result of the fact that surfaces become more separated under field. Experiments and simulations are in good qualitative agreement.
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