Imperial College London


Faculty of EngineeringDepartment of Mechanical Engineering

Senior Lecturer



+44 (0)20 7594 8991j.wong




671City and Guilds BuildingSouth Kensington Campus






BibTex format

author = {Jeffreys, S and di, Mare L and Liu, X and Morgan, N and Wong, J},
doi = {10.1039/C8RA09396B},
journal = {RSC Advances},
pages = {1441--1450},
title = {Elastohydrodynamic lubricant flow with nanoparticle tracking},
url = {},
volume = {9},
year = {2019}

RIS format (EndNote, RefMan)

AB - Lubricants operating in elastohydrodynamic (EHD) contacts exhibit local variations in rheological properties when the contact pressure rises. Direct evidence of this behaviour has only been obtained by examining through-thickness velocity profiles U(z) of lubricants in a contact using luminescence-based imaging velocimetry. In the present study, nanoparticles (NPs) are added to polybutene (PB) as tracers to investigate the effect of pressure on the flow of PB in an EHD contact. By tracking NPs in the contact, particle velocity distributions f(U) under various pressures are obtained and found to be pressure dependent. Results show quantitatively that f(U) and U(z) are correlated and thus confirm that U(z) of PB changes from Couette flow to partial plug flow above a critical pressure. This confirmation highlights the complexity of lubricant rheology in a high pressure contact.
AU - Jeffreys,S
AU - di,Mare L
AU - Liu,X
AU - Morgan,N
AU - Wong,J
DO - 10.1039/C8RA09396B
EP - 1450
PY - 2019///
SN - 2046-2069
SP - 1441
TI - Elastohydrodynamic lubricant flow with nanoparticle tracking
T2 - RSC Advances
UR -
UR -!divAbstract
UR -
VL - 9
ER -