Combined effects of piezo – viscous coupled stress lubricant and rotational inertia upon squeeze film performance of rough circular discs
Abstract
Purpose
The purpose of this paper is to investigate squeezing and rotating motions between two rough parallel circular discs lubricated by piezo – viscous couple stress lubricant with pressure-dependent viscosity variation.
Design/methodology/approach
Based upon the Stokes couple stress theory, Barus viscosity-pressure dependency relation and Christensen rough surfaces model, squeeze film characteristics between two rough parallel circular discs are obtained.
Findings
According to the results, it is found that, the combined effects of couple stresses and viscosity-pressure dependency increases squeeze film performance with respect to the classical Newtonian iso-viscous (constant viscosity) lubricant. However, increasing the rotational inertia parameter reduces squeeze film characteristics. On the other hand, depending on the structure of surface roughness, the squeeze film characteristics can be increased or decreased. Furthermore, results show that the surface roughness with circular pattern increases squeeze film characteristics, while the surface roughness with radial pattern will decrease it.
Originality/value
This paper is relatively original and describes the squeeze film characteristics between two parallel circular discs with viscosity-pressure dependency, rotational inertia, couple stresses and surface roughness effects.
Keywords
Acknowledgements
The authors would like to acknowledge the financial supports from Sahand University of technology during this research.
Citation
Daliri, M. and Jalali-Vahid, D. (2015), "Combined effects of piezo – viscous coupled stress lubricant and rotational inertia upon squeeze film performance of rough circular discs", Industrial Lubrication and Tribology, Vol. 67 No. 6, pp. 564-571. https://doi.org/10.1108/ILT-01-2015-0009
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited