Three-Dimensional Thermohydrodynamic Analysis of Journal Bearing Lubricated by Magnetic Fluids with Couple Stresses

Authors

  • Ruaa Braz Dahham Ministry of Education – Najaf Education Directorate – School Building Division – Najaf – Iraq.
  • Noora A. Hashim University of Kufa – Mechanical Engineering Department – Najaf – Iraq.
  • Fatima Mohammed K. Al-Fatlwe Al-Furat Al-Awsat Technical University – Engineering Technical College – Najaf – Iraq.

Keywords:

Coupled stress, Magnetic fluids, Load currying capacity

Abstract

Couple stresses because of magnetic particles additives on the lubrication performance of a journal bearing system was embraced and scrutinized in the current examinations theoretically. The governing equations of Reynolds (pressure field), energy (temperature field), and heat conduction (temperature field through the solids) are coupled and solved instantaneously in term of temperature and viscosity. After these set of equation pressure is obtained, it is used to obtain the bearing characteristic. It was found that the load currying capacity and maximum pressure are increased due the employing of magnetic fluids along with the couple stresses, as well as side leakage flow and the friction coefficient are decreased. It can be also concluded that the magnetic fluids with couple stresses are better lubricant than magnetic fluid only, Newtonian fluids, and couple stress fluid = 0.


Downloads

Published

2023-02-09 — Updated on 2023-02-13

Versions

Issue

Vol. 15 (2023)

Section

Original Papers

License

Copyright (c) 2023 Ruaa Braz Dahham , Noora A. Hashim , Fatima Mohammed K. Al-Fatlwe

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This work is licensed under a Creative Commons — Attribution 4.0 International — CC BY 4.0. Authors are free to Share (copy and redistribute the material in any medium or format) and Adapt (remix, transform, and build upon the material for any purpose, even commercially). JATM allow the authors to retain publishing rights without restrictions.