Abstract
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.
Highlights
In partially wet granular beds, liquid migrates between particles due to collisions and contacts
In to the hydrophobic coating applied on the drum walls in industry, liquid migration can be found in pharmaceutical applications such as spray coating of tablets and granulathe experiments [1, 10], liquid bridges formation between particles and the walls of the drum were switched off
It is still unclear how to deal with liquid redistribution upon bridge rupture, and how this interplays with the flow behaviour of granular media
Summary
In partially wet granular beds, liquid migrates between particles due to collisions and contacts. Value 0.0605 0.022 1.25 2500 63 0.21 the effect of capillary forces and liquid transfer on liquid distribution and flow behaviour of particles in a rotating
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