EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Fluids and Particles|
|Published online||07 June 2021|
Liquid migration in flowing granular materials
Multi-Scale Mechanics (MSM), TFE, ET, MESA+, Institute for Nanotechnology, University of Twente, The Netherlands.
2 Physics of Fluids Group, MESA+, TNW, J.M. Burgers Center for Fluid Dynamics, University of Twente, The Netherlands.
3 Construction Management and Engineering (CME), Faculty of Engineering Technology, University of Twente, The Netherlands.
Published online: 7 June 2021
In partially wet granular beds, liquid migrates between particles due to collisions and contacts. This, in turn, influences the flow behaviour of the granular bed. We investigate liquid redistribution in moving monodisperse particles in a rotating drum using Discrete Element Method (DEM) simulations. For weak capillary forces, liquid re-distribution, induced by the continuous flow of particles, leads to concentration of the liquid in the core of the bed, where the flow is quasi-static. High capillary forces reduce the surface flow speed and granular temperature. This decreases liquid bridges rupturing in the flowing layer, allowing the liquid to remain in the outer region of the bed.
A video is available at https://doi.org/10.48448/r3th-bb77
© The Authors, published by EDP Sciences, 2021
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