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Velocity fields in grease lubricated contacts
Author(s) -
Mutuli S.,
Bonneau D.,
Frène J.
Publication year - 1989
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010020103
Subject(s) - grease , lubricant , materials science , core (optical fiber) , cylinder , mechanics , inclined plane , plane (geometry) , surface (topology) , flow (mathematics) , flow visualization , composite material , geometry , mechanical engineering , engineering , physics , mathematics
This paper examines the behaviour of a grease lubricant in open contacts. Analytical expressions of velocity profiles for a Bingham fluid are presented for three cases: flow where all the film thickness is sheared; where a non‐sheared core zone is attached to one contact surface; and where a core zone floats in the middle of the film. An experimental study is described which used visualization through illumination across contact surfaces. Results are presented for two modes of operation: contact of cylinder and fixed plane surface, and pure rolling of two cylinders. In the former case, nine zones of operation are identified.