Coalescence-induced droplet spreading: Experiments aboard the International Space Station

被引：6
|
作者：
McCraney, J. [1 ]
Ludwicki, J. [1 ]
Bostwick, J. [2 ]
Daniel, S. [1 ]
Steen, P. [1 ]
机构：
[1] Cornell Univ, Robert Frederick Smith Sch Chem & Biomol Engn, Ithaca, NY 14853 USA
[2] Clemson Univ, Dept Mech Engn, Clemson, SC 29631 USA
来源：
PHYSICS OF FLUIDS | 2022年 / 34卷 / 12期
基金：
美国国家科学基金会;
关键词：
CONTACT-ANGLE; DYNAMICS; MODEL;
D O I：
10.1063/5.0125279
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We report experiments of centimeter-sized sessile drop coalescence aboard the International Space Station, where microgravity conditions enable inertial-capillary spreading motions to be explored for a range of hydrophobic wetting conditions. Observations of the time traces of the coalescence event and projected areas compare favorably to numerical simulations, which employ the Davis-Hocking contact line (CL) condition with contact line mobility M parameter independently measured using the resonant-frequency scan technique of Xia and Steen [ "Moving contact-line mobility measured, " J. Fluid Mech. 841, 767-783 (2018)]. This observation suggests that M is a material parameter, and that the Davis-Hocking model is an appropriate CL model for inertial-capillary spreading.
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收藏
页数：8
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