Theoretical and experimental study of transient squeezing flow in a highly porous film

被引：12
作者：
Lang, Ji [1 ,2 ]
Nathan, Rungun [1 ,3 ]
Wu, Qianhong [1 ,2 ]
机构：
[1] Villanova Univ, Cellular Biomech & Sports Sci Lab, 800 E Lancaster Ave, Villanova, PA 19085 USA
[2] Villanova Univ, Dept Mech Engn, 800 E Lancaster Ave, Villanova, PA 19085 USA
[3] Penn State Univ Berks, Reading, PA 19610 USA
来源：
TRIBOLOGY INTERNATIONAL | 2019年 / 135卷
基金：
美国国家科学基金会;
关键词：
Porous media; Squeezing film; Transient; Brinkman equation; CONSTANT NORMAL FORCE; THIN FLUID LAYER; PARALLEL PLATES; REYNOLDS-NUMBER; HEAT-TRANSFER; INERTIA; MEDIA; LUBRICATION; GLYCOCALYX; DERIVATION;
D O I：
10.1016/j.triboint.2019.02.046
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
We report a theoretical and experimental study for transient squeezing flow through a thin, highly porous structure, where the pressure response is governed by the local acceleration, the viscous effect and the Darcy force from the porous structure. It is predicted that the flow developed from an initial inviscid stage to a behavior attesting to the Brinkman equation. The transition is governed by the Brinkman number and the ratio of Reynolds number to Stroudhal number. An experimental study was performed, showing excellent agreement with the theory. The paper, revealing the important role of soft porous media for squeeze damping and lubrication, has significant potential in biomedical and industrial applications.
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页码：259 / 268
页数：10
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