scholarly journals Evaporation of a capillary bridge between a particle and a surface

Soft Matter ◽  
2014 ◽  
Vol 10 (42) ◽  
pp. 8489-8499 ◽  
Author(s):  
Michael J. Neeson ◽  
Raymond R. Dagastine ◽  
Derek Y. C. Chan ◽  
Rico F. Tabor
Keyword(s):  
Spray Drying ◽  
Liquid Bridge ◽  
Flat Surface ◽  
Physical Processes ◽  
Capillary Bridge ◽  
Evaporative Lithography

The liquid bridge that forms between a particle and a flat surface, and the dynamics of its evaporation are pertinent to a range of physical processes including paint and ink deposition, spray drying, evaporative lithography and the flow and processing of powders.

Particulate Templates and Ordered Liquid Bridge Networks in Evaporative Lithography

Langmuir ◽  
2009 ◽  
Vol 25 (23) ◽  
pp. 13311-13314 ◽  
Author(s):  
Ivan U. Vakarelski ◽  
Jin W. Kwek ◽  
Xiaosong Tang ◽  
Sean J. O’Shea ◽  
Derek Y. C. Chan
Keyword(s):  
Liquid Bridge ◽  
Bridge Networks ◽  
Evaporative Lithography

Numerical simulations of self-propelled jumping upon drop coalescence on non-wetting surfaces

2014 ◽  
Vol 752 ◽  
pp. 39-65 ◽  
Author(s):  
Fangjie Liu ◽  
Giovanni Ghigliotti ◽  
James J. Feng ◽  
Chuan-Hua Chen
Keyword(s):  
Numerical Simulations ◽  
Liquid Bridge ◽  
Flat Surface ◽  
Three Dimensional ◽  
Superhydrophobic Surfaces ◽  
Ohnesorge Number ◽  
Drop Coalescence ◽  
Out Of Plane ◽  
Potential Applications ◽  
Cutoff Radius

AbstractCoalescing drops spontaneously jump out of plane on a variety of biological and synthetic superhydrophobic surfaces, with potential applications ranging from self-cleaning materials to self-sustained condensers. To investigate the mechanism of self-propelled jumping, we report three-dimensional phase-field simulations of two identical spherical drops coalescing on a flat surface with a contact angle of 180°. The numerical simulations capture the spontaneous jumping process, which follows the capillary–inertial scaling. The out-of-plane directionality is shown to result from the counter-action of the substrate to the impingement of the liquid bridge between the coalescing drops. A viscous cutoff to the capillary–inertial velocity scaling is identified when the Ohnesorge number of the initial drops is around 0.1, but the corresponding viscous cutoff radius is too small to be tested experimentally. Compared to experiments on both superhydrophobic and Leidenfrost surfaces, our simulations accurately predict the nearly constant jumping velocity of around 0.2 when scaled by the capillary–inertial velocity. By comparing the simulated drop coalescence processes with and without the substrate, we attribute this low non-dimensional velocity to the substrate intercepting only a small fraction of the expanding liquid bridge.

scholarly journals Mimicking Spray Drying by Drying of Single Droplets Deposited on a Flat Surface

2012 ◽  
Vol 6 (4) ◽  
pp. 964-977 ◽  
Author(s):  
Jimmy Perdana ◽  
Martijn B. Fox ◽  
Maarten A. I. Schutyser ◽  
Remko M. Boom
Keyword(s):  
Spray Drying ◽  
Flat Surface ◽  
Single Droplets

scholarly journals Switchable Electrohydrodynamic Capillary Bridges

2020 ◽  
Author(s):  
Tianxing Ma ◽  
Darrel Dsouza ◽  
Matthew Signorelli ◽  
Krysten Ryerson ◽  
Michael Loewenberg ◽  
...  
Keyword(s):  
Electric Field ◽  
Liquid Bridge ◽  
Field Application ◽  
Large Field ◽  
Droplet Volume ◽  
Parallel Plate Capacitor ◽  
Capillary Bridge ◽  
External Conditions ◽  
The Subject ◽  
Stable Field

<p>The deformation of sessile droplets and capillary bridging in a parallel-plate capacitor under DC fields has been the subject of several scientific studies. Coaxially located droplets on opposing electrodes experience an attraction in the presence of an electric field. Application of a suitably large field will lead to either the droplets forming a liquid bridge or oscillation between bridged and de-bridged (i.e. droplet) states. We explored the bridging behavior of a variety of liquids in air. Among the liquids and droplet geometries that could form a stable field-induced bridge, only a limited set could reversibly make and break the capillary bridge by switching the electric field on and off. The ability to form a switchable liquid bridge is a function of both the liquid’s properties, including surface tension, electric conductivity, and dielectric constant, and external conditions such as electrode separation, droplet volume.</p>

Exact Solution for Capillary Bridges Properties by Shooting Method

2017 ◽  
Vol 72 (4) ◽  
pp. 315-320 ◽  
Author(s):  
Li Qiang-Nian ◽  
Zhang Jia-Qi ◽  
Zhou Feng-Xi
Keyword(s):  
Exact Solution ◽  
Liquid Bridge ◽  
Capillary Force ◽  
Shooting Method ◽  
Moving Boundary ◽  
Contact Angles ◽  
Spherical Particles ◽  
Capillary Bridge ◽  
Capillary Suction ◽  
Wet Particles

AbstractThe investigation of liquid bridge force acting between wet particles has great significance in many fields. In this article, the exact solution of capillary force between two unequal-sized spherical particles is investigated. Firstly, The Young-Laplace equation with moving boundary is converted into a set of ordinary differential equations with two fix point boundary using variable substitution technique, in which the gravity effects have been neglected. The geometry of the liquid bridge between two particles is solved by shooting method. After that, the gorge method is applied to calculate the capillary-bridge force that is consists of contributions from the capillary suction and surface tension. Finally, the effect of various parameters including distance between two spheres, radii of spheres, and contact angles on the capillary force are investigated. It is shown that the presented approach is an efficient and accurate algorithm for capillary force between two particles in complex situations.

Capillary-bridge mediated assembly of aligned perovskite quantum dots for high-performance photodetectors

2019 ◽  
Vol 7 (20) ◽  
pp. 5954-5961 ◽  
Author(s):  
Zhigao Dai ◽  
Qingdong Ou ◽  
Chujie Wang ◽  
Guangyuan Si ◽  
Babar Shabbir ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Liquid Bridge ◽  
High Performance ◽  
Capillary Bridge ◽  
Assembly Strategy ◽  
Perovskite Quantum Dots

A liquid bridge induced assembly strategy to align perovskite QDs in one direction for high-performance photodetectors.

Switchable Electrohydrodynamic Capillary Bridges

2020 ◽  
Author(s):  
Tianxing Ma ◽  
Darrel Dsouza ◽  
Matthew Signorelli ◽  
Krysten Ryerson ◽  
Michael Loewenberg ◽  
...  
Keyword(s):  
Electric Field ◽  
Liquid Bridge ◽  
Field Application ◽  
Large Field ◽  
Droplet Volume ◽  
Parallel Plate Capacitor ◽  
Capillary Bridge ◽  
External Conditions ◽  
The Subject ◽  
Stable Field

<p>The deformation of sessile droplets and capillary bridging in a parallel-plate capacitor under DC fields has been the subject of several scientific studies. Coaxially located droplets on opposing electrodes experience an attraction in the presence of an electric field. Application of a suitably large field will lead to either the droplets forming a liquid bridge or oscillation between bridged and de-bridged (i.e. droplet) states. We explored the bridging behavior of a variety of liquids in air. Among the liquids and droplet geometries that could form a stable field-induced bridge, only a limited set could reversibly make and break the capillary bridge by switching the electric field on and off. The ability to form a switchable liquid bridge is a function of both the liquid’s properties, including surface tension, electric conductivity, and dielectric constant, and external conditions such as electrode separation, droplet volume.</p>

Foam-Film-Stabilized Liquid Bridge Networks in Evaporative Lithography and Wet Granular Matter

Langmuir ◽  
2013 ◽  
Vol 29 (16) ◽  
pp. 4966-4973 ◽  
Author(s):  
Ivan U. Vakarelski ◽  
Jeremy O. Marston ◽  
Sigurdur T. Thoroddsen
Keyword(s):  
Liquid Bridge ◽  
Granular Matter ◽  
Bridge Networks ◽  
Foam Film ◽  
Evaporative Lithography

scholarly journals Capillary Forces between Concave Gripper and Spherical Particle for Micro-Objects Gripping

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 285
Author(s):  
Zenghua Fan ◽  
Zixiao Liu ◽  
Congcong Huang ◽  
Wei Zhang ◽  
Zhe Lv ◽  
...  
Keyword(s):  
Spherical Particle ◽  
Liquid Bridge ◽  
Capillary Force ◽  
Numerical Procedure ◽  
Capillary Forces ◽  
Radius Ratio ◽  
Solid Surfaces ◽  
Capillary Bridge ◽  
Half Filling ◽  
Significant Attention

The capillary action between two solid surfaces has drawn significant attention in micro-objects manipulation. The axisymmetric capillary bridges and capillary forces between a spherical concave gripper and a spherical particle are investigated in the present study. A numerical procedure based on a shooting method, which consists of double iterative loops, was employed to obtain the capillary bridge profile and bring the capillary force subject to a constant volume condition. Capillary bridge rupture was characterized using the parameters of the neck radius, pressure difference, half-filling angle, and capillary force. The effects of various parameters, such as the contact angle of the spherical concave gripper, the radius ratio, and the liquid bridge volume on the dimensionless capillary force, are discussed. The results show that the radius ratio has a significant influence on the dimensionless capillary force for the dimensionless liquid bridge volumes of 0.01, 0.05, and 0.1 when the radius ratio value is smaller than 10. The effectiveness of the theorical approach was verified using simulation model and experiments.

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

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