Why is surface tension a force parallel to the interface?

被引：149

作者：

Marchand, Antonin ^{[1
]}

Weijs, Joost H. ^{[2
,3
]}

Snoeijer, Jacco H. ^{[2
,3
]}

Andreotti, Bruno ^{[1
]}

机构：

[1] Univ Paris Diderot, UMR ESPCI CNRS 7636, F-75005 Paris, France

[2] Univ Twente, Phys Fluids Grp, NL-7500 AE Enschede, Netherlands

[3] Univ Twente, JM Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

来源：

AMERICAN JOURNAL OF PHYSICS | 2011年 / 79卷 / 10期

关键词：

capillarity; force; physics education; surface tension; thermodynamics; CONTACT-ANGLE; LINE TENSION; DEFORMATION; SUBSTRATE; PRESSURE; DYNAMICS; FLUID;

D O I：

10.1119/1.3619866

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

A paperclip can float on water. Drops of mercury do not spread on a surface. These capillary phenomena are macroscopic manifestations of molecular interactions and can be explained in terms of surface tension. We address several conceptual questions that are often encountered when teaching capillarity and provide a perspective that reconciles the macroscopic viewpoints from thermodynamics and fluid mechanics and the microscopic perspective from statistical physics. (C) 2011 American Association of Physics Teachers. [DOI: 10.1119/1.3619866]

引用

页码：999 / 1008

页数：10

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