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http://dx.doi.org/10.9725/kts.2020.36.6.359

CFD Analysis of Trap Effect of Groove in Lubricating Systems: Part II - Variation in Radius of Curvature of Groove Edge  

Hong, Sung-Ho (Dept. of Mechanical System Engineering, Dongguk University-Gyeongju)
Publication Information
Tribology and Lubricants / v.36, no.6, 2020 , pp. 359-364 More about this Journal
Abstract
Numerical investigation of the groove trap effect with variation in the groove-edge radius of curvature is presented here. The trap effect is evaluated in a two-dimensional sliding bearing using computational fluid dynamics (CFD). This simulation is based on the discrete phase model (DPM) and standard k - ε turbulence model using commercial CFD software, FLUENT. The numerical results are evaluated by comparisons with streamlines and particle trajectories in the grooves. Grooves are applied to various lubrication systems to improve their lubrication characteristics, such as load carrying capacity increment, leakage reduction, frictional loss reduction, and preventing three-body abrasive wear due to trapping effect. This study investigates the grove trapping effect for various groove-edge radius of curvature values and Reynolds numbers. The particle is assumed to be made of steel, with a circular shape, and is injected as a single particle in various positions. One-way coupling is used in the DPM model because the single particle injection condition is applied. Further, the "reflect" condition is applied to the wall boundary and "escape" condition is used for the "pressure inlet" and "pressure outlet" boundaries. From the numerical results, the groove edge radius is found to influence the groove trap effect. Moreover, the groove trap effect is more effective when applying the groove edge radius.
Keywords
CFD; edge; groove; trap effect;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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