Spreading dynamics and contact angle of completely wetting volatile drops

被引：19

作者：

Jambon-Puillet, Etienne ^{[1
]}

Carrier, Odile ^{[1
]}

Shahidzadeh, Noushine ^{[1
]}

Brutin, David ^{[2
]}

Eggers, Jens ^{[3
]}

Bonn, Daniel ^{[1
]}

机构：

[1] Univ Amsterdam, Inst Phys, Van der Waals Zeeman Inst, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[2] Aix Marseille Univ, IUSTI UMR 7343, F-13453 Marseille, France

[3] Univ Bristol, Sch Math, Univ Walk, Bristol BS8 1TW, Avon, England

来源：

JOURNAL OF FLUID MECHANICS | 2018年 / 844卷

关键词：

condensation; evaporation; contact lines; drops; EVAPORATING DROPLETS; SESSILE DROPLETS; CONVECTION; DIFFUSION; LIQUIDS;

D O I：

10.1017/jfm.2018.142

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The spreading of evaporating drops without a pinned contact line is studied experimentally and theoretically, measuring the radius R(t) of completely wetting alkane drops of different volatility on glass. Initially the drop spreads ( R increases), then owing to evaporation reverses direction and recedes with an almost constant non-zero contact angle theta proportional to beta(1/3), where beta measures the rate of evaporation; eventually the drop vanishes at a finite-time singularity. Our theory, based on a first-principles hydrodynamic description, well reproduces the dynamics of R and the value of theta during retraction.

引用

页码：817 / 830

页数：14

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