ELASTOHYDRODYNAMIC LUBRICATION OF CIRCULAR CONTACTS AT PURE SQUEEZE MOTION INVOLVING THE MIXTURE OF TWO LUBRICANTS

Authors

Li-Ming Chu, Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, TaiwanFollow
Yuh-Ping Chang, Department of Mechanical Engineering, Kun Shan University, Tainan City 71070, Taiwan
Jer-Jia Sheu, Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan City 71005, Taiwan

Abstract

This study investigated the pure squeeze elastohydrodynamic lubrication (EHL) motion of circular contacts by using mixed rheology fluid models under constant load conditions. The lubricant was a homogeneous mixture of a Newtonian base oil and couple stress fluid at various volume fractions. The simulation results revealed that the effect of the couple stress fluid was equivalent to enhancing the viscosity of the lubricant. Therefore, the central film thickness and minimum film thickness increased with the volume fraction of the couple stress fluid (ν). The central pressure decreased as ν increased. In addition, the normal squeeze velocity followed the ensuing order: Newtonian lubricant > mixed lubricants > couple stress lubricant.

Recommended Citation

Chu, Li-Ming; Chang, Yuh-Ping; and Sheu, Jer-Jia (2015) "ELASTOHYDRODYNAMIC LUBRICATION OF CIRCULAR CONTACTS AT PURE SQUEEZE MOTION INVOLVING THE MIXTURE OF TWO LUBRICANTS," Journal of Marine Science and Technology: Vol. 23: Iss. 4, Article 15.
DOI: 10.6119/JMST-015-0325-1
Available at: https://jmstt.ntou.edu.tw/journal/vol23/iss4/15