Stability of a liquid bridge between nonparallel hydrophilic surfaces

Ataei, Mohammadmehdi; Chen, H.; Tang, Tian; Amirfazli, Alidad

doi:10.1016/j.jcis.2016.11.092

Cited by 28 publications

(38 citation statements)

References 21 publications

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“…Contact angle hysteresis may also play an important role in limiting the motion of a fluid droplet in a rigid system, which would likely eventually force the system into the separating mode over tilt and migrate. Indeed, Ataei et al (2017) found that in the presence of contact angle hysteresis, the tilt must exceed a critical angle for the droplet to begin migrating, which may limit the effect of tilting mentioned here. These extensions would each be worth further work; which of them is most pressing should perhaps be guided by the results of further experiments.…”

Section: Detachment In Capillary Adhesion 23 Of 30mentioning

confidence: 90%

Detachment in capillary adhesion: the relative roles of tilting and separation

Butler

Vella

2020

IMA Journal of Applied Mathematics

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We study the dynamics of detachment in 2D capillary adhesion by considering a plate that is initially attached to a flat, rigid substrate via the surface tension of a bridging liquid droplet. In particular, we focus on the effect of allowing the plate to tilt freely during its subsequent motion. A linear stability analysis shows that small perturbations from equilibrium decouple into two modes: one in which the plate separates from the substrate, remaining parallel, and another in which it tilts, simultaneously causing the bridging droplet to migrate. If the initial tilt perturbation is of a similar magnitude to (or bigger than) the separation perturbation, then the presence of this second tilting mode can significantly alter the dynamics. Indeed, this tilting mechanism changes the ultimate fate of the plate: depending on the size of the plate and the initial perturbation, the plate may anomalously detach. We discuss this observation in relation to previous experiments on a 3D system that showed a qualitatively similar anomalous detachment.

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Section: Detachment In Capillary Adhesion 23 Of 30mentioning

confidence: 90%

Detachment in capillary adhesion: the relative roles of tilting and separation

Butler

Vella

2020

IMA Journal of Applied Mathematics

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“…In general, the stability of a liquid bridge sandwiched between two non-parallel surfaces is determined by two necessary conditions [31,39]. First, the pressure inside the liquid droplet should be uniform so that the droplet can stay in equilibrium, thus the following geometrical relationship should be satisfied [23,31]:…”

Section: The Stability Of Confined Droplet Between Two Non-parallel S...mentioning

confidence: 99%

“…As such, the evaporation of colloidal liquid bridges formed between two non-parallel hydrophilic surfaces and their special drying patterns have been reported [29,30]. However, in these studies, it was hard for the liquid bridges to get stabilized at a specific location because of the dominant effect of Laplace pressure [25,31]. As a result, the liquid bridge quickly moved towards and filled the corner of the Vshaped groove and the deposition pattern of solute/colloidal particles was not concentrated within a relatively small footprint due to the coffee-ring effect [29,32,33].…”

Section: Introductionmentioning

confidence: 99%

Evaporation-triggered directional transport of asymmetrically confined droplets

Cheng

2021

Journal of Colloid and Interface Science

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“…Profiles of the capillary bridges between a rough surface and a parallel surface were modelled [15], and the predicted results were verified experimentally. Ataei et al [16] performed systematic investigations on a capillary bridge between nonparallel solid surfaces by combining experimental and numerical approaches. The critical dihedral angle ensuring the stability of the formed capillary bridge was significantly determined by the advancing contact angle and contact angle hysteresis.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Stability of a liquid bridge between nonparallel hydrophilic surfaces

Cited by 28 publications

References 21 publications

Detachment in capillary adhesion: the relative roles of tilting and separation

Detachment in capillary adhesion: the relative roles of tilting and separation

Evaporation-triggered directional transport of asymmetrically confined droplets

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

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