The lubrication approximation of the friction force for the simulation of measured surfaces

被引：11

作者：

Checo, Hugo M. ^{[1
]}

Jaramillo, Alfredo ^{[1
]}

Ausas, Roberto F. ^{[1
]}

Buscaglia, Gustavo C. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Ciencias Matemat & Computacao, BR-13560970 Sao Carlos, SP, Brazil

来源：

TRIBOLOGY INTERNATIONAL | 2016年 / 97卷

基金：

巴西圣保罗研究基金会;

关键词：

Hydrodynamic lubrication; Friction force; Measured-surface simulation; Mass-conservative model; REYNOLDS-EQUATION; STOKES EQUATIONS; HOMOGENIZATION; ROUGHNESS;

D O I：

10.1016/j.triboint.2015.12.030

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Models of the friction force are assessed by direct comparison with two-dimensional Navier-Stokes results. A three-term formula obtained from asymptotic expansion provides a reasonable estimate of the hydrodynamic friction of rough runners even at sub-micron clearances. Simulations of a measured honed surface are then reported using the conservative time-dependent Elrod-Adams model with spatial resolutions as fine as 0.25 mu m per cell (4000 x 800 mesh). Mesh convergence of the numerical method is observed. Cell sizes between 0.5 mu m and 1 mu m appear as a reasonable compromise of accuracy and cost for the simulation of honed runners. The significance of each term of the friction formula is discussed, so as to assess the error involved in neglecting terms of the friction formula. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：390 / 399

页数：10

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