Liquid migration in sheared unsaturated granular media
Roman Mani, Dirk Kadau, Hans J. Herrmann
TL;DR
This paper investigates how liquid redistributes in sheared unsaturated granular media using a grain-scale model, revealing that liquid migration aligns with continuum descriptions and affects velocity and density profiles.
Contribution
It introduces a grain-scale model for capillary bridge rupture and liquid redistribution, connecting microscopic processes to macroscopic flow and density behaviors.
Findings
Liquid migrates to neighboring contacts after bridge rupture.
Liquid profile evolution matches continuum models.
Velocity and density profiles are influenced by liquid migration.
Abstract
We show how liquid migrates in sheared unsaturated granular media using a grain scale model for capillary bridges. Liquid is redistributed to neighboring contacts after rupture of individual capillary bridges leading to redistribution of liquid on large scales. The liquid profile evolution coincides with a recently developed continuum description for liquid migration in shear bands. The velocity profiles which are linked to the migration of liquid as well as the density profiles of wet and dry granular media are studied.
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