Capillary-bridge forces between solid particles: Insights from lattice Boltzmann simulations
Yang L, Sega M, Harting J (2021)
Publication Type: Journal article
Publication year: 2021
Journal
DOI: 10.1002/aic.17350
Abstract
Liquid capillary-bridge formation between solid particles has a critical influence on the rheological properties of granular materials and, in particular, on the efficiency of fluidized bed reactors. The available analytical and semi-analytical methods have inherent limitations, and often do not cover important aspects, like the presence of non-axisymmetric bridges. Here, we conduct numerical simulations of the capillary bridge formation between equally and unequally sized solid particles using the lattice Boltzmann method, and provide an assessment of the accuracy of different families of analytical models. We find that some of the models taken into account are shown to perform better than others. However, all of them fail to predict the capillary force for contact angles larger than pi/2, where a repulsive capillary force attempts to push the solid particle outward to minimize the surface energy, especially at a small separation distance. We then apply the most suitable model to study the impact of capillary interactions on particle clustering using a coupled lattice Boltzmann and Discrete Element method.
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Germany (DE)How to cite
APA:
Yang, L., Sega, M., & Harting, J. (2021). Capillary-bridge forces between solid particles: Insights from lattice Boltzmann simulations. AIChE Journal. https://dx.doi.org/10.1002/aic.17350
MLA:
Yang, Lei, Marcello Sega, and Jens Harting. "Capillary-bridge forces between solid particles: Insights from lattice Boltzmann simulations." AIChE Journal (2021).
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