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Static characteristics of ferrofluid finite journal bearing considering rotational viscosity effect
Author(s) -
Laghrabli Salem,
El Khlifi Mohamed,
Nabhani Mohamed,
BouSaïd Benyebka
Publication year - 2017
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1364
Subject(s) - ferrofluid , reynolds equation , viscosity , lubrication , mechanics , finite volume method , finite difference method , eccentricity (behavior) , materials science , rotational speed , bearing (navigation) , finite difference , ferromagnetism , magnetic field , reynolds number , condensed matter physics , physics , classical mechanics , mathematics , thermodynamics , composite material , mathematical analysis , law , quantum mechanics , astronomy , political science , turbulence
Considering the rotation of ferromagnetic particles, the present study investigates hydrodynamic lubrication by ferrofluids of finite journal bearings using the Shliomis model. A magnetic field created by displaced finite wire is used. A numerical solution for the modified Reynolds equation using the finite difference method is obtained. Static characteristics of finite journal bearings are analysed using three control parameters: rotational viscosity, magnetization and volume concentration of the ferromagnetic particles. It is shown that the pressure, load capacity, attitude angle and side leakage increase and the friction coefficient decreases when increasing the value of each control parameter. Similar trends are also obtained when increasing values of eccentricity for a fixed value of each control parameter except for the decrease of the attitude angle. Copyright © 2016 John Wiley & Sons, Ltd.