Abstract
The coupled effects of surface roughness and flow rheology on elastohydrodynamic lubrication (EHL) circular contact problems are analyzed and discussed. The averaged type Reynolds equation utilizing the average flow model on the interactions between couple stress fluids and surface roughness, the elastic deformation equation, the viscosity-pressure and density-pressure relations equations, and the force balance equation are solved numerically by the multilevel multi-integration (MLMI) algorithm to calculate the pressure distributions and film thickness shapes. The results show that the transverse type roughness and standard deviation of composite roughness enhance the pressure and film thickness in the central contact region. Moreover, the longer the characteristic length of the couple stress fluids is, the smaller the pressure distribution is in the central contact region and the greater the film thickness is in all regions.
| Original language | English |
|---|---|
| Pages (from-to) | 483-490 |
| Number of pages | 8 |
| Journal | Tribology International |
| Volume | 43 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films
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Coupled effects of surface roughness and flow rheology on elastohydrodynamic lubrication. / Chu, Li Ming; Li, Wang-Long; Lin, Jaw Ren; Chang, Yuh Ping.
In: Tribology International, Vol. 43, No. 1-2, 01.01.2010, p. 483-490.Research output: Contribution to journal › Article
TY - JOUR
T1 - Coupled effects of surface roughness and flow rheology on elastohydrodynamic lubrication
AU - Chu, Li Ming
AU - Li, Wang-Long
AU - Lin, Jaw Ren
AU - Chang, Yuh Ping
PY - 2010/1/1
Y1 - 2010/1/1
N2 - The coupled effects of surface roughness and flow rheology on elastohydrodynamic lubrication (EHL) circular contact problems are analyzed and discussed. The averaged type Reynolds equation utilizing the average flow model on the interactions between couple stress fluids and surface roughness, the elastic deformation equation, the viscosity-pressure and density-pressure relations equations, and the force balance equation are solved numerically by the multilevel multi-integration (MLMI) algorithm to calculate the pressure distributions and film thickness shapes. The results show that the transverse type roughness and standard deviation of composite roughness enhance the pressure and film thickness in the central contact region. Moreover, the longer the characteristic length of the couple stress fluids is, the smaller the pressure distribution is in the central contact region and the greater the film thickness is in all regions.
AB - The coupled effects of surface roughness and flow rheology on elastohydrodynamic lubrication (EHL) circular contact problems are analyzed and discussed. The averaged type Reynolds equation utilizing the average flow model on the interactions between couple stress fluids and surface roughness, the elastic deformation equation, the viscosity-pressure and density-pressure relations equations, and the force balance equation are solved numerically by the multilevel multi-integration (MLMI) algorithm to calculate the pressure distributions and film thickness shapes. The results show that the transverse type roughness and standard deviation of composite roughness enhance the pressure and film thickness in the central contact region. Moreover, the longer the characteristic length of the couple stress fluids is, the smaller the pressure distribution is in the central contact region and the greater the film thickness is in all regions.
UR - http://www.scopus.com/inward/record.url?scp=71549155996&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=71549155996&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2009.08.001
DO - 10.1016/j.triboint.2009.08.001
M3 - Article
VL - 43
SP - 483
EP - 490
JO - Tribology International
JF - Tribology International
SN - 0301-679X
IS - 1-2
ER -