Numerical approach to interpret the attributes of porous journal bearings using couple-stress fluid
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 13 October 2020
Issue publication date: 4 March 2021
Abstract
Purpose
The purpose of this paper is to study the amalgamated consequences of nonNewtonian fluid and permeability for nonporous journal spinning with constant tangential velocity inside a rough porous bearing.
Design/methodology/approach
The flow is assumed to have developed under low Reynolds number, and the flow is governed by reduced Navier–Stokes equations. Based on Stokes theory for couple-stress fluid, a closed form of nonNewtonian Reynolds equation is obtained. Finite difference based multigrid method is adopted to study the various parameters of journal bearings.
Findings
It is found that bearing attributes such as pressure distribution and weight carrying capacity are commanding for nonNewtonian couple-stress fluid compared to the classical Newtonian case.
Originality/value
The multigrid method for the Reynolds equation is used, which accelerates the convergence rate of the solution and is independent of the grid size. The effects of couple-stress fluid promote the enhanced pressure distribution in the fluid. Both increased weight bearing capacity and delayed squeezing time reduce the skin-friction and hence take longer time to come in contact with each other.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0051/
Keywords
Acknowledgements
The authors of this paper are profoundly grateful to referees for their appreciated report and suggestions in improving the quality of the paper.
Citation
Patil, S.M., Vinay, C.V. and P.A., D. (2021), "Numerical approach to interpret the attributes of porous journal bearings using couple-stress fluid", Industrial Lubrication and Tribology, Vol. 73 No. 2, pp. 253-259. https://doi.org/10.1108/ILT-02-2020-0051
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited