Effects of surface wettability on contact line motion in liquid–liquid displacement

2021 ◽  
Vol 33 (8) ◽  
pp. 082101
Author(s):  
Wenxiu Zheng ◽  
Boyao Wen ◽  
Chengzhen Sun ◽  
Bofeng Bai
Keyword(s):  
Contact Line ◽  
Surface Wettability ◽  
Contact Line Motion ◽  
Liquid Displacement

Contact line motion and dynamic wetting of nanofluid solutions

2008 ◽  
Vol 138 (2) ◽  
pp. 101-120 ◽  
Author(s):  
Khellil Sefiane ◽  
Jennifer Skilling ◽  
Jamie MacGillivray
Keyword(s):  
Contact Line ◽  
Dynamic Wetting ◽  
Contact Line Motion

scholarly journals Contact Angle Profiles for Droplets on Omniphilic Surfaces in the Presence of Tangential Forces

2019 ◽  
Vol 3 (4) ◽  
pp. 60 ◽  
Author(s):  
Kostoglou ◽  
Karapantsios
Keyword(s):  
Contact Angle ◽  
Contact Line ◽  
Theoretical Perspective ◽  
Three Dimensional ◽  
Real Life ◽  
Suggested Approach ◽  
Droplet Shape ◽  
Tangential Forces ◽  
Contact Line Motion ◽  
Static Conditions

In real life, sessile droplets usually have a three-dimensional shape, making it difficult to understand their forced wetting behavior, both from an experimental and a theoretical perspective. Even in the case of spreading under quasi-static conditions, where the droplet shape is described by the Young–Laplace equation, there is no fundamental approach to describe the contact line evolution. In the present work, a few existing approaches on this issue are analyzed and assessed. It is shown that an experimentally inspired fixed shape for the contact line of droplets that are spreading under the action of tangential forces can be considered equivalent to a theory for contact line motion. There is a lack of experimental data for contact line evolution under arbitrary scenarios of forces. Such data will be very helpful for the further development of the suggested approach to contact line motion. Of particular interest is the case of small contact angle droplets, for which a top view can clearly indicate the contact line location. On the contrary, in such droplets, the direct experimental measurement of contact angle profile is very difficult. This must be estimated theoretically; thus, a special approach has been developed here for this purpose.

Bridge Dynamics for Capillary-Based Liquid Deposition

2012 ◽  
Author(s):  
Artur Lutfurakhmanov ◽  
Yechun Wang ◽  
Douglas L. Schulz
Keyword(s):  
Experimental Data ◽  
Contact Line ◽  
Liquid Droplet ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Non Invasive ◽  
Contact Line Motion ◽  
Liquid Deposition ◽  
Good Agreement ◽  
Bridge Dynamics

A new capillary-based lithography technique of liquid droplet deposition is further developed. Main advantage of this method in comparison with others techniques is that it is non-invasive both to the substrate and to the writing tip. The method is studied both theoretically and experimentally. To adequately describe bridge dynamics between the capillary and the substrate, proper boundary conditions must be set in the model for the liquid-surface interface. Based on literature review, two laws of contact line motion are identified: Tanner’s law and Blake’s equation. These two approaches are tested in multiple experiments with different retraction speeds from 3 microns/s to 300 microns/s. Analysis of the experimental data show that both Tanner’s and Blake’s equation can describe the correlation between the contact line velocity and the dynamic contact angle. In addition, both laws are employed in the direct numerical simulation of the bridge dynamics using 3D spectral boundary element method. Modeling results are compared with experimental data and show good agreement.

Visualization of contact line motion on hydrophobic textures

2013 ◽  
Vol 1 (2) ◽  
pp. 84-91 ◽  
Author(s):  
Katherine M. Smyth ◽  
Adam T. Paxson ◽  
Hyuk-Min Kwon ◽  
Kripa K. Varanasi
Keyword(s):  
Contact Line ◽  
Contact Line Motion

Contact line motion without slip in lattice Boltzmann simulations

2011 ◽  
Vol 66 (14) ◽  
pp. 3452-3458 ◽  
Author(s):  
M.R. Kamali ◽  
J.J.J. Gillissen ◽  
S. Sundaresan ◽  
H.E.A. Van den Akker
Keyword(s):  
Contact Line ◽  
Lattice Boltzmann ◽  
Lattice Boltzmann Simulations ◽  
Contact Line Motion

Design of an Experimental Setup to Investigate an Oscillating and Evaporating Meniscus Using a Feedback Control Loop

2016 ◽  
Author(s):  
Alyssa Recinella ◽  
Joseph Baldwin ◽  
Charles Krouse ◽  
Robert Walkowiak ◽  
Pruthvik Raghupathi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Contact Line ◽  
Experimental Test ◽  
Heated Surface ◽  
Nucleate Boiling ◽  
Injection System ◽  
Experimental Setup ◽  
Test Setup ◽  
Liquid Injection ◽  
Liquid Displacement

Nucleate boiling is one of the most efficient methods to dissipate heat. However, the complex physics of heat transfer near the contact line is not well understood. Due to the difficulty in measuring and analyzing heat transfer around a bubble at high heat fluxes, novel approaches must be taken. This paper focuses on the design of an experimental setup used to simulate heat transfer at the contact line by studying an oscillating meniscus on a heated surface. A preliminary design of the experimental test setup is described in this paper. The experimental test setup will be composed of a liquid injection system with a needle, an oscillator, a heated surface, and a sensor to measure the meniscus volume. A feedback loop will be used to control the liquid injection system and prevent dry out or flooding during evaporation. Furthermore, a conic speaker will be used to induce oscillations at a range of 10–200 Hz. These oscillations simulate liquid displacement during bubble nucleation, growth, and bubble departure. Finally, a sensor that measures the volume of the liquid will be connected to the heated plate and the needle in order to measure the volume of the meniscus while oscillating. A fundamental understanding of the heat transfer in the contact line region is expected.

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