lubricants-08-00017-v2.pdf (1.56 MB)
Performance of poly alpha olefin nanolubricant
journal contribution
posted on 2020-03-02, 14:26 authored by Nader DolatabadiNader Dolatabadi, Ramin RahmaniRamin Rahmani, Homer Rahnejat, Colin GarnerColin Garner, Charles BruntonThe viscosity and tribological behavior of nanofluids formed by dispersed nano-diamond particles within Poly-Alpha-Olefin (PAO6) lubricant is studied at different concentrations. The variation of coefficient of friction with nanoparticle concentration is measured using pin-on-disc tribometry under boundary, mixed, and hydrodynamic regimes of lubrication. A multi-scale multi-physics thermo-mixed lubrication model is developed to provide fundamental understanding of the measured tribometric results. The analytical approach combines continuum contact mechanics, thermal-mixed lubrication comprising the interaction of rough surfaces, as well as a thermal network heat transfer model. In particular, Einstein's viscosity model for dispersed hard particles together with Vogel’s viscosity-temperature dependence model for fluid viscosity containing nanoparticles represent new contributions to knowledge. This integrated numerical-experimental study of nanofluid thermal and tribological assessment has not hitherto been reported in literature. It is shown that improved heat transfer capability of nanofluids is particularly effective in the reduction of friction under a mixed regime of lubrication.
Funding
Lloyd’s Registry Foundation under the International Cavitation Research Institute
Engineering and Physical Sciences Research Council for funding of the Encyclopaedic Program Grant (EP/G012334/1)
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
LubricantsVolume
8Issue
2Publisher
MDPI AGVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).Acceptance date
2020-02-03Publication date
2020-02-07Copyright date
2020eISSN
2075-4442Publisher version
Language
- en
Depositor
Dr Ramin Rahmani. Deposit date: 2 March 2020Article number
17Usage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC