CFD Analysis of Transient Effects in Elastohydrodynamic Lubrication of Rough Surfaces
- Lehrstuhl für Maschinenelemente
- experimentell theoretisch konstruktiv
The main role of a lubricant in machine elements is to separate parts in relative motion. A properly designed lubricant needs to be viscous enough to prevent contact between moving parts but at the same time being easily sheared to provide low friction. Finding this balance requires knowing effects of operating conditions, solid and liquid material properties on lubricant film formation. In this regard, CFD technique proved to be especially useful.
The aim of this study is to improve an already existing CFD model of EHL line contact problem and to extend its capabilities to rough surfaces and point contact problems. The developed CFD models should be capable of:
- Taking into consideration non-Newtonian fluid behavior and thermal effects
- Exploring the effect of surface roughness on the pressure, film thickness and physical behavior of the lubricant film, in transient conditions
The developed CFD models should be validated by comparing the CFD results against literature
results or experimental measurements of the film thickness profile and/or friction.
- Basic understanding of numerical analysis and ANSYS Fluent
- Basic knowledge of C programming language
- Möglicher Beginn