Capillary interactions between soft capsules protruding through thin fluid films

Wouters, Maarten; Aouane, Othmane; Sega, Marcello; Harting, Jens

doi:10.1039/d0sm01385d

Cited by 6 publications

(8 citation statements)

References 84 publications

(181 reference statements)

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“…We do not expect any interactions through the fluids, since the movement of the particles is very slow, and therefore no significant pressure contributions are expected in between the particles due to compressions in the fluid. Also, no significant capillary interactions as studied in our previous paper [19] are expected, since the height of the fluid–fluid interface is positioned near the centre of the centre of mass of the particles.…”

Section: Particle Ordering In a Single Layer Of Soft Particlesmentioning

confidence: 81%

“…For more details on our implementation, we refer the reader to some of our previous publications [18,19,25,31–36].…”

Section: Methodsmentioning

confidence: 99%

“…On the contrary, rigid particles, having no internal degree of freedom, can be brought to the energy minimum only by rearranging their relative positions. We have attempted in our previous work [19] to correlate the deformation energy of the particles to the fluid one by measuring the capillary force between two particles adsorbed onto a fluid–fluid interface for different softness parameters (β) and comparing the results to the rigid particle case. We observed that the capillary interaction force decreases as the softness parameter increases.…”

Section: Particle Ordering In a Single Layer Of Soft Particlesmentioning

confidence: 99%

“…Here, we focus on the drying of a suspension consisting of soft colloidal particles and apply our recently introduced simulation method [18,19] to study the influence of the particle softness and deformability on the ordering and structuring during drying. In this sense, we remain in the domain of generic, drying colloidal suspensions of soft particles, without treating specific aspects of latex paints like the polymeric nature of the particles and the latex film-formation.…”

Section: Introductionmentioning

confidence: 99%

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Lattice Boltzmann simulations of drying suspensions of soft particles

Wouters

Aouane

Sega

et al. 2021

Phil. Trans. R. Soc. A.

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The ordering of particles in the drying process of a colloidal suspension is crucial in determining the properties of the resulting film. For example, microscopic inhomogeneities can lead to the formation of cracks and defects that can deteriorate the quality of the film considerably. This type of problem is inherently multiscale and here we study it numerically, using our recently developed method for the simulation of soft polymeric capsules in multicomponent fluids. We focus on the effect of the particle softness on the film microstructure during the drying phase and how it relates to the formation of defects. We quantify the order of the particles by measuring both the Voronoi entropy and the isotropic order parameter. Surprisingly, both observables exhibit a non-monotonic behaviour when the softness of the particles is increased. We further investigate the correlation between the interparticle interaction and the change in the microstructure during the evaporation phase. We observe that the rigid particles form chain-like structures that tend to scatter into small clusters when the particle softness is increased. This article is part of the theme issue ‘Progress in mesoscale methods for fluid dynamics simulation’.

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Section: Particle Ordering In a Single Layer Of Soft Particlesmentioning

confidence: 81%

“…For more details on our implementation, we refer the reader to some of our previous publications [18,19,25,31–36].…”

Section: Methodsmentioning

confidence: 99%

Section: Particle Ordering In a Single Layer Of Soft Particlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lattice Boltzmann simulations of drying suspensions of soft particles

Wouters

Aouane

Sega

et al. 2021

Phil. Trans. R. Soc. A.

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“…Clusters of particles formed at the liquid-vapor interface appear on the substrate after complete evaporation of the liquid. Another mechanism for the formation of particle clusters as a result of their capillary attraction is their self-assembly on the substrate where the thickness of the liquid layer is less than the particle size [3]. The calculations were performed using the modification of LBM.…”

Section: Introductionmentioning

confidence: 99%

Average cluster size inside sediment left after droplet desiccation

Zolotarev,

Kolegov

2020

Preprint

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In this work, we continue to study the formation of particle chains (clusters) inside the annular sediment during the drying of a colloidal droplet on a substrate. The average value of the cluster size was determined after processing experimental data from other authors. We performed a series of calculations and found the value of the model parameter allowed to get numerical results agreed with the experiment. Also, a modification of the previously proposed algorithm is analyzed here.

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