Viscous liquid–liquid wetting and dewetting of textured surfaces

Soft Matter ◽  
2021 ◽  
Author(s):  
Xiaoyi Hu ◽  
Zhen Wang ◽  
David J. Hwang ◽  
Carlos E. Colosqui ◽  
Thomas Cubaud
Keyword(s):  
Viscous Liquid ◽  
Patterned Surfaces ◽  
Textured Surfaces ◽  
Water Droplets ◽  
Small Water

We experimentally investigate the spreading and receding behavior of small water droplets immersed in viscous oils on grid-patterned surfaces using synchronized bottom and profile views.

A First Assessment of an Aerodynamic Barrier Layer for Filtering Airborne Hygroscopic Particles

2021 ◽  
Author(s):  
Francisco Arias ◽  
Salvador De Las Heras
Keyword(s):  
Barrier Layer ◽  
Geometrical Model ◽  
Airborne Particles ◽  
Equivalent Diameter ◽  
Infected Person ◽  
Water Droplets ◽  
Small Water ◽  
Parallel Arrangement ◽  
Novel Strategy ◽  
Hygroscopic Particles

Abstract In this work consideration is given to an aerodynamic concept for filtration of small water droplets such as those caused by an infected person when coughs or sneezes and including airborne hygroscopic particle, and with particular application to medical masks. Nowadays, the efficiency of such masks is strongly reduced for airborne particles and increasing the efficiency implies either increasing the thickness of the filtering layers or decreasing the aerodynamic equivalent diameter of the pore, both measures in clear detriment of its breathability. Here, a novel strategy is proposed in which efficiency is increased, not by decreasing the diameter of the pore but actually by increasing the diameter of the water droplet itself. We called this concept as the aerodynamic barrier layer. In this concept a layer with parallel arrangement of micro fibers in the direction of the flow is located just before the traditional filtering layer and being able to promote lift forces which induce clustering, coalescence and growth of water droplets at the center of the aerodynamic channel. The enlarged drop after passing though the aerodynamic barrier layer is now easy captured by a conventional filtering layer. Utilizing a simplified geometrical model, an expression for the required length of the aerodynamic barrier layer was derived.

Study on the generation process of small water droplets driven by bubbles penetrating oil-water interface

2004 ◽  
Vol 2004.2 (0) ◽  
pp. 241-242 ◽  
Author(s):  
Tomomasa UEMURA ◽  
Yasufumi YAMAMOTO ◽  
Noriyoshi YONEHARA ◽  
Manabu IGUCHI
Keyword(s):  
Generation Process ◽  
Water Interface ◽  
Water Droplets ◽  
Small Water ◽  
Oil Water

scholarly journals Manipulating small water droplets on a photo-switchable mat of fluorinated linear liquid crystal polymers

Giant ◽  
2020 ◽  
Vol 2 ◽  
pp. 100019
Author(s):  
Xiao Zhang ◽  
Lang Qin ◽  
Yuyun Liu ◽  
Jia Wei ◽  
Yanlei Yu
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Polymers ◽  
Water Droplets ◽  
Small Water

A Study of Homogeneous Condensation-Freezing Nucleation of Small Water Droplets in an Expansion Cloud Chamber

1980 ◽  
Vol 37 (11) ◽  
pp. 2508-2520 ◽  
Author(s):  
Rodney J. Anderson ◽  
Ronald C. Miller ◽  
James L. Kassner ◽  
Donald E. Hagen
Keyword(s):  
Cloud Chamber ◽  
Water Droplets ◽  
Homogeneous Condensation ◽  
Small Water
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