Dynamic wetting: status and prospective of single particle based experiments and simulations

Cappelli, S.; Xie, Qingguang; Harting, Jens; Jong, de Am Arthur; Prins, Mwj Menno

doi:10.1016/j.nbt.2015.02.010

Cited by 18 publications

(10 citation statements)

References 103 publications

(182 reference statements)

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“…velocity of the particle surface. Qualitatively this fits with the expectations from experiments and simulations on similar systems with rigid particles [72], where the additional asymmetric deformation of the particle appears to allow a stronger deformation of the interface. A more detailed and thorough analysis of this phenomenon, including the effect of the preferential contact angle of the particle boundary, is left for future work.…”

Section: Soft Capsule At An Interface Under Shearsupporting

confidence: 88%

Mesoscale simulation of soft particles with tunable contact angle in multicomponent fluids

2019

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Soft particles at fluid interfaces play an important role in many aspects of our daily life, such as the food industry, paints and coatings, and medical applications. Analytical methods are not capable of describing the emergent effects of the complex dynamics of suspensions of many soft particles, whereas experiments typically either only capture bulk properties or require invasive methods. Computational methods are therefore a great tool to complement experimental work. However, an efficient and versatile numerical method is needed to model dense suspensions of many soft particles. In this article we propose a method to simulate soft particles in a multi-component fluid, both at and near fluid-fluid interfaces, based on the lattice Boltzmann method, and characterize the error stemming from the fluid-structure coupling for the particle equilibrium shape when adsorbed onto a fluid-fluid interface. Furthermore, we characterize the influence of the preferential contact angle of the particle surface and the particle softness on the vertical displacement of the center of mass relative to the fluid interface. Finally, we demonstrate the capability of our model by simulating a soft capsule adsorbing onto a fluid-fluid interface with a shear flow parallel to the interface, and the covering of a droplet suspended in another fluid by soft particles with different wettability.

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Section: Soft Capsule At An Interface Under Shearsupporting

confidence: 88%

Mesoscale simulation of soft particles with tunable contact angle in multicomponent fluids

2019

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“…22,28,29 For a detailed description of the method including the extension to particles suspended in multicomponent flows, we refer the reader to the relevant literature. 23,24,[30][31][32] We perform simulations of two particles and multiple particles. For simulations between two particles, we place two particles along the x axis separated by a distance L AB .…”

Section: Simulation Methodsmentioning

confidence: 99%

Controlled capillary assembly of magnetic Janus particles at fluid–fluid interfaces

2016

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Capillary interactions can be used to direct assembly of particles adsorbed at fluid-fluid interfaces.Precisely controlling the magnitude and direction of capillary interactions to assemble particles into favoured structures for materials science purposes is desirable but challenging. In this paper, we investigate capillary interactions between magnetic Janus particles adsorbed at fluid-fluid interfaces. We develop a pair-interaction model that predicts that these particles should arrange into a side-side configuration, and carry out simulations that confirm the predictions of our model. Finally, we investigate the monolayer structures that form when many magnetic Janus particles adsorb at the interface. We find that the particles arrange into long, straight chains exhibiting little curvature, in contrast with capillary interactions between ellipsoidal particles. We further find a regime in which highly ordered, lattice-like monolayer structures form, which can be tuned dynamically using an external magnetic field.

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“…These undulated contours occur because of contact line pinning, e.g. by kinetic trapping at high energy or jagged sites on the particle, and/or patchy wetting [23][24][25][26], and because of complex shape, for which even equilibrated contact lines are undulated. Thus, for anisotropically shaped particles, undulated contours are the norm for contact lines in either trapped or equilibrium states.…”

Section: Capillary Interactions (A) Planar Interfacesmentioning

confidence: 99%

Curvature-driven assembly in soft matter

Liu

Sharifi-Mood

Stebe

2016

Phil. Trans. R. Soc. A.

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Control over the spatial arrangement of colloids in soft matter hosts implies control over a wide variety of properties, ranging from the system's rheology, optics, and catalytic activity. In directed assembly, colloids are typically manipulated using external fields to form well-defined structures at given locations. We have been developing alternative strategies based on fields that arise when a colloid is placed within soft matter to form an inclusion that generates a potential field. Such potential fields allow particles to interact with each other. If the soft matter host is deformed in some way, the potential allows the particles to interact with the global system distortion. One important example is capillary assembly of colloids on curved fluid interfaces. Upon attaching, the particle distorts that interface, with an associated energy field, given by the product of its interfacial area and the surface tension. The particle's capillary energy depends on the local interface curvature. We explore this coupling in experiment and theory. There are important analogies in liquid crystals. Colloids in liquid crystals elicit an elastic energy response. When director fields are moulded by confinement, the imposed elastic energy field can couple to that of the colloid to define particle paths and sites for assembly. By improving our understanding of these and related systems, we seek to develop new, parallelizable routes for particle assembly to form reconfigurable systems in soft matter that go far beyond the usual close-packed colloidal structures.This article is part of the themed issue 'Soft interfacial materials: from fundamentals to formulation'.

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Dynamic wetting: status and prospective of single particle based experiments and simulations

Cited by 18 publications

References 103 publications

Mesoscale simulation of soft particles with tunable contact angle in multicomponent fluids

Mesoscale simulation of soft particles with tunable contact angle in multicomponent fluids

Controlled capillary assembly of magnetic Janus particles at fluid–fluid interfaces

Curvature-driven assembly in soft matter

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