Surface Roughness Effects on Fluid Flow between Two Rotating Cylinders

Sutthinan Srirattayawong; Shian Gao

doi:10.4028/www.scientific.net/KEM.642.275

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 642Surface Roughness Effects on Fluid Flow between...

Surface Roughness Effects on Fluid Flow between Two Rotating Cylinders

Abstract:

In general, the thin fluid film problems are explained by the classical Reynolds equation, but this approach has some limitations. To overcome them, the method of Computational Fluid Dynamics (CFD) is used in this study, as an alternative to solving the Reynolds equation. The characteristics of the two cylinders contact with real surface roughness are investigated. The CFD model has been used to simulate the behavior of the fluid flows at the conjunction between two different radius cylinders. The non-Newtonian fluid is employed to calculate the lubricant viscosity, and the thermal effect is also considered in the evaluation of the lubricant properties. The pressure distributions, the fluid film thickness and the temperature distributions are investigated. The obtained results show clearly the significance of the surface roughness on the lubricant flow at the contact center area. The fluctuated flow also affects the pressure distribution, the temperature and the lubricant viscosity in a similar pattern to the rough surface profile. The surface roughness effect will decrease when the film thickness is increased.

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Periodical:

Key Engineering Materials (Volume 642)

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275-280

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https://doi.org/10.4028/www.scientific.net/KEM.642.275

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Online since:

April 2015

Authors:

Sutthinan Srirattayawong*, Shian Gao

Keywords:

CFD, Cylinders Contact, EHL, Non-Newtonian, Surface Roughness (SR)

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