scholarly journals Partial wetting of thin solid sheets under tension

Soft Matter ◽  
2018 ◽  
Vol 14 (24) ◽  
pp. 4913-4934 ◽  
Author(s):  
Benny Davidovitch ◽  
Dominic Vella
Keyword(s):  
Contact Line ◽  
Capillary Force ◽  
Liquid Droplets ◽  
Partial Wetting ◽  
Thin Elastic Sheets ◽  
Elastic Sheets

We consider the equilibrium of liquid droplets sitting on thin elastic sheets that are subject to a boundary tension and/or are clamped at their edge. We study the geometrical–mechanical interplay through which the capillary force exerted by the droplet at the contact line modifies a pre-existing stress within the sheet, and characterize the parameter regimes in which this effect is large (non-perturbative) or small (perturbative).

scholarly journals Thin Films in Partial Wetting: Internal Selection of Contact-Line Dynamics

2015 ◽  
Vol 115 (3) ◽  
Author(s):  
Amir Alizadeh Pahlavan ◽  
Luis Cueto-Felgueroso ◽  
Gareth H. McKinley ◽  
Ruben Juanes
Keyword(s):  
Thin Films ◽  
Contact Line ◽  
Partial Wetting ◽  
Internal Selection ◽  
Selection Of ◽  
Contact Line Dynamics

scholarly journals Oscillatory fracture paths in thin elastic sheets

2003 ◽  
Vol 331 (12) ◽  
pp. 811-816 ◽  
Author(s):  
B. Roman ◽  
P.M. Reis ◽  
B. Audoly ◽  
S. De Villiers ◽  
V. Viguié ◽  
...  
Keyword(s):  
Thin Elastic Sheets ◽  
Elastic Sheets

G221 Measurement of concentration and capillary force in contact line with the gas dissolution

2005 ◽  
Vol 2005 (0) ◽  
pp. 455-456
Author(s):  
Junji KAMOSIDA ◽  
Hiroaki NAGAI ◽  
Yasuharu MIYAMOTO
Keyword(s):  
Contact Line ◽  
Capillary Force

Energy Scaling Laws for Conically Constrained Thin Elastic Sheets

2012 ◽  
Vol 113 (2) ◽  
pp. 251-264 ◽  
Author(s):  
Jeremy Brandman ◽  
Robert V. Kohn ◽  
Hoai-Minh Nguyen
Keyword(s):  
Scaling Laws ◽  
Thin Elastic Sheets ◽  
Energy Scaling ◽  
Elastic Sheets ◽  
Energy Scaling Laws

RELAXATION MODES OF THE CONTACT LINE IN SITUATION OF PARTIAL WETTING

1992 ◽  
Vol 06 (15) ◽  
pp. 901-916 ◽  
Author(s):  
THIERRY ONDARÇUHU
Keyword(s):  
Relaxation Rate ◽  
Contact Line ◽  
Driving Force ◽  
Original Method ◽  
Experimental Measurements ◽  
Partial Wetting ◽  
Dispersion Law ◽  
Model Surfaces ◽  
Relaxation Modes ◽  
Dissipation Processes

We present here a brief review of theoretical and experimental results concerning the relaxation modes of the contact line between a solid, a liquid and a gas. This study constitutes a first step in view of the elucidation of wetting of non-homogeneous surfaces. The dispersion law giving the characteristic relaxation rate as a function of the wavevector of the deformation is derived from the balance of elastic driving force and dissipation processes. The very anomalous form of the dispersion law is confirmed by experimental measurements achieved on model surfaces using an original method to deform periodically the line.

Contact Line Pinning and Depinning Prior to Rupture of an Evaporating Droplet in a Simulated Soil Pore

2020 ◽  
Author(s):  
Partha P. Chakraborty ◽  
Melanie M. Derby
Keyword(s):  
Contact Line ◽  
Pressure Difference ◽  
Liquid Droplet ◽  
Liquid Droplets ◽  
Water Contact ◽  
Marginal Rate ◽  
Vapor Interface ◽  
Hydrophobic Pore ◽  
Contact Line Pinning ◽  
Liquid Vapor

Abstract Altering soil wettability by inclusion of hydrophobicity could be an effective way to restrict evaporation from soil, thereby conserving water resources. In this study, 4-μL sessile water droplets were evaporated from an artificial soil millipore comprised of three glass (i.e. hydrophilic) and Teflon (i.e. hydrophobic) 2.38-mm-diameter beads. The distance between the beads were kept constant (i.e. center-to-center spacing of 3.1 mm). Experiments were conducted in an environmental chamber at an air temperature of 20°C and 30% and 75% relative humidity (RH). Evaporation rates were faster (i.e. ∼19 minutes and ∼49 minutes at 30% and 75% RH) from hydrophilic pores than the Teflon one (i.e. ∼24 minutes and ∼52 minutes at 30% and 75% RH) due in part to greater air-water contact area. Rupture of liquid droplets during evaporation was analyzed and predictions were made on rupture based on contact line pinning and depinning, projected surface area just before rupture, and pressure difference across liquid-vapor interface. It was observed that, in hydrophilic pore, the liquid droplet was pinned on one bead and the contact line on the other beads continuously decreased by deforming the liquid-vapor interface, though all three gas-liquid-solid contact lines decreased at a marginal rate in hydrophobic pore. For hydrophilic and hydrophobic pores, approximately 1.7 mm2 and 1.8–2 mm2 projected area of the droplet was predicted at 30% and 75% RH just before rupture occurs. Associated pressure difference responsible for rupture was estimated based on the deformation of curvature of liquid-vapor interface.

scholarly journals High-speed transport of liquid droplets in magnetic tubular microactuators

2018 ◽  
Vol 4 (12) ◽  
pp. eaau8767 ◽  
Author(s):  
Wenwei Lei ◽  
Guanglei Hou ◽  
Mingjie Liu ◽  
Qinfeng Rong ◽  
Yichao Xu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Capillary Force ◽  
High Speed ◽  
Magnetic Particles ◽  
Liquid Droplets ◽  
Open Surface ◽  
Liquid Motion ◽  
Practical Applications ◽  
Closed Tube ◽  
Droplet Splitting

Magnetic field–induced droplet actuation has attracted substantial research interest in recent years. However, current magnetic-controlled liquids depend primarily on magnetic particles added to a droplet, which serves as the actuator on an open surface. These liquids inevitably suffer from droplet splitting with the magnetic particles or disengaging with the magnet, possibly leading to sample contamination, which severely limits their transport speed and practical applications. Here, we report a simple and additive-free method to fabricate magnetic tubular microactuators for manipulating liquid droplets by magnetism-induced asymmetric deformation, which generates an adjustable capillary force to propel liquids. These magnetic tubular microactuators can drive various liquid droplets with controllable velocity and direction. A speed of 10 cm s−1can be achieved, representing the highest speed of liquid motion driven by an external stimulus–induced capillary force in a closed tube found so far.

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