Capillary Interactions, Aggregate Formation, and the Rheology of Particle-Laden Flows: A Lattice Boltzmann Study

Yang L, Sega M, Leimbach S, Kolb S, Karl J, Harting J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Industrial & Engineering Chemistry Research American Chemical Society (ACS)

DOI: 10.1021/acs.iecr.1c03909

Abstract

The agglomeration of particles caused by the formation of capillary bridges has a decisive impact on the transport properties of a variety of at a first sight very different systems such as capillary suspensions, fluidized beds in chemical reactors, or even sand castles. Here, we study the connection between the microstructure of the agglomerates and the rheology of fluidized suspensions using a coupled lattice Boltzmann and discrete element method approach. We address the influence of the shear rate, the secondary fluid surface tension, and the suspending liquid viscosity. The presence of capillary interactions promotes the formation of either filaments or globular clusters, leading to an increased suspension viscosity. Unexpectedly, filaments have the opposite effect on the viscosity as compared to globular clusters, decreasing the suspension viscosity at larger capillary interaction strengths. In addition, we show that the suspending fluid viscosity also has a nontrivial influence on the effective viscosity of the suspension, a fact usually not taken into account by empirical models.

Authors with CRIS profile

Steffen Leimbach Lehrstuhl für Energieverfahrenstechnik Sebastian Kolb Lehrstuhl für Energieverfahrenstechnik Jürgen Karl Lehrstuhl für Energieverfahrenstechnik

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE)

How to cite

APA:

Yang, L., Sega, M., Leimbach, S., Kolb, S., Karl, J., & Harting, J. (2022). Capillary Interactions, Aggregate Formation, and the Rheology of Particle-Laden Flows: A Lattice Boltzmann Study. Industrial & Engineering Chemistry Research. https://dx.doi.org/10.1021/acs.iecr.1c03909

MLA:

Yang, Lei, et al. "Capillary Interactions, Aggregate Formation, and the Rheology of Particle-Laden Flows: A Lattice Boltzmann Study." Industrial & Engineering Chemistry Research (2022).

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