Change search
ReferencesLink to record
Permanent link

Direct link
Measurements of grease flow in channels with restrictions using μPIV
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Show others and affiliations
2010 (English)In: 14th Nordic Symposium on Tribology: NORDTRIB 2010 : Storforsen, Sweden, June 8-11, 2010, Luleå: Luleå tekniska universitet, 2010Conference paper (Refereed)
Abstract [en]

Grease is commonly used to lubricate various machine components such as rolling element bearings, open gears etc. Better understanding of the flow properties of grease will contribute to understanding the lubrication mechanism in bearings and flow in lubrication systems. In an earlier paper Micro Particle Image Velocimetry (μPIV) techniques were used to study the flow in a rectangular channel. The present paper is an extension of this work where restrictions were applied in such a channel, which creates a much more complex velocity field. The grease is seeded with fluorescent particles, which are illuminated by a double-pulsed laser. The test geometries that are used in this study are a channel with one flat restriction and one with two flow restrictions in a similar channel. The stationary grease mass-flow and the two dimensional velocity fields have been monitored for different pressure drops. For the channel with one flat restriction, the flow was measured to be symmetric at the inlet and outlet, and the distance for the flow to fully develop is comparable with the height of the channel; Slow motion was followed near the step corner at the inlet. For the channel with two flow restrictions, the vector profiles show that the maximum velocity appears at the restrictions; In-between the two restrictions, a part of the grease is not moving. This particularly applies to cases with low-pressure drop and where high consistency grease was used.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2010.
Research subject
Machine Elements; Fluid Mechanics
URN: urn:nbn:se:ltu:diva-30918Local ID: 4ed4b140-836d-11df-ab16-000ea68e967bISBN: 978-91-7439-124-4 (PDF)OAI: diva2:1004147
Nordic Symposium on Tribology : 08/06/2010 - 11/06/2010
Godkänd; 2010; Bibliografisk uppgift: CD-ROM; 20100629 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

Open Access in DiVA

fulltext(6077 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 6077 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Li, JinxiaWesterberg, Lars-GöranGreen, TorbjörnLundström, StaffanLugt, PietBaart, Pieter
By organisation
Machine ElementsFluid and Experimental Mechanics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link