Impact dynamics of surfactant laden drops: dynamic surface tension effects

被引：108

作者：

Aytouna, Mounir ^{[2
]}

Bartolo, Denis ^{[4
]}

Wegdam, Gerard ^{[2
]}

Bonn, Daniel ^{[2
,3
]}

Rafai, Salima ^{[1
]}

机构：

[1] UJF, CNRS, UMR5588, Spectrometrie Phys Lab, Grenoble, France

[2] Van der Waals Zeeman Inst, Amsterdam, Netherlands

[3] ENS, CNRS, UMR8550 P6 P7, Lab Phys Stat, F-75230 Paris 05, France

[4] ESPCI, CNRS, UMR7636 P6 P7, F-75005 Paris, France

来源：

EXPERIMENTS IN FLUIDS | 2010年 / 48卷 / 01期

关键词：

MECHANISMS; DROPLETS;

D O I：

10.1007/s00348-009-0703-9

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

We study the impact and subsequent retraction of aqueous surfactant-laden drops upon high-speed impact on hydrophobic surfaces. Without surfactants, a rapid expansion of the drop due to the fluid inertia is followed by a rapid retraction, due to the wetting incompatibility. With surfactants, the retraction can be partly or completely inhibited. We provide quantitative measurements showing that both the expansion and the retraction dynamics depend not only on the equilibrium surface tension (ST) but also on the dynamic tension of the surfactant solutions; the latter varies significantly between different surfactants.

引用

页码：49 / 57

页数：9

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