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The non‐Newtonian effect of temperature on hydrodynamic lubrication failure
Author(s) -
Guangjun Zhang,
Ping Huang,
Shizhu Wen,
Huirong Meng
Publication year - 1998
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.3010100306
Subject(s) - lubrication , newtonian fluid , rheology , materials science , non newtonian fluid , mechanics , viscosity , generalized newtonian fluid , constitutive equation , thermodynamics , limiting , thermal , momentum (technical analysis) , composite material , shear rate , mechanical engineering , engineering , physics , finite element method , finance , economics
The influence of temperature on the rheological characteristics of lubricants has been investigated by analysing the viscosity‐temperature relationship and energy equation of lubricants. The constitutive equation, which describes the non‐Newtonian properties of lubricants caused by thermal effects, is founded and coupled with equations of continuity and momentum of the fluid to calculate the load‐carrying capacity in hydrodynamic lubrication. The numerical solutions show that lubricants have ultimate shear strength as a result of the non‐Newtonian effect of temperature, which leads to the oil film having limiting load‐carrying capacity. The mechanism of film failure in hydro‐dynamic lubrication is also studied preliminarily in this paper.