Contact line deposits in an evaporating drop

被引：1912

作者：

Deegan, RD ^{[1
]}

Bakajin, O ^{[1
]}

Dupont, TF ^{[1
]}

Huber, G ^{[1
]}

Nagel, SR ^{[1
]}

Witten, TA ^{[1
]}

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW E | 2000年 / 62卷 / 01期

关键词：

D O I：

10.1103/PhysRevE.62.756

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Solids dispersed in a drying drop will migrate to the edge of the drop and form a solid ring. This phenomenon produces ringlike stains and occurs for a wide range of surfaces, solvents, and solutes. Here we show that the migration is caused by an outward flow within the drop that is driven by the loss of solvent by evaporation and geometrical constraint that the drop maintain an equilibrium droplet shape with a fixed boundary. We describe a theory that predicts the flow velocity, the rate of growth of the ring, and the distribution of solute within the drop. These predictions are compared with our experimental results.

引用

页码：756 / 765

页数：10

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