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Understanding grease flow through optical visualizations
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
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2012 (English)Conference paper, Presentation (Refereed)
Abstract [en]

The flow dynamics of a lubrication mechanism is very complex, much due to the complex rheology and composition of the grease. In order to obtain an optimal lubrication, both the initial amount of grease and the position of the grease is highly important as too much grease will contribute to an increased friction, and grease in the wrong place will negatively affect the replenishment through oil bleeding. To understand the flow dynamics of grease hence is highly important for the understanding of the lubrication mechanism. Using micro Particle Image Velocimetry (μPIV) we have in a series of studies investigated the dynamics of grease flow in 2D straight channels with- and without restrictions, and in a full 3D configuration comprising a double restriction seal geometry. Velocity profiles for greases of different thickness have been measured, showing the influence of the grease rheology on the grease flow behaviour. KEYWORDS: Lubricants:Greases, Lubricant Physical Analysis:Non-Newtonian Behavior, Lubricant Physical Analysis:Rheology.

Place, publisher, year, edition, pages
2012.
Research subject
Fluid Mechanics; Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-37271Local ID: b3ef756f-4be4-45fc-a91c-9886779c8bb5OAI: oai:DiVA.org:ltu-37271DiVA: diva2:1010769
Conference
STLE Annual Meeting & Exhibition : 06/05/2012 - 10/05/2012
Note
Godkänd; 2012; 20120511 (lgwe)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Westerberg, Lars-GöranGreen, TorbjörnLi, JinxiaBaart, PieterLundström, T. StaffanHöglund, ErikLugt, Piet
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