Fluid depletion in shear bands

Abstract

How does pore liquid reconfigure within shear bands in wet granular media? Conventional wisdom predicts that liquid is drawn into dilating granular media. We, however, find a depletion of liquid in shear bands despite increased porosity due to dilatancy. This apparent paradox is resolved by a microscale model for liquid transport at low liquid contents induced by rupture and reconfiguration of individual liquid bridges. Measured liquid content profiles show macroscopic depletion bands similar to results of numerical simulations. We derive a modified diffusion description for rupture-induced liquid migration.

5 pages, 4 figures

References in corpus (4)

• Shear zones in granular media: 3D Contact Dynamics simulation
• Granular Flows in Split-Bottom Geometries
• Dilute Wet Granulates: Nonequilibrium Dynamics and Structure Formation
• Collapsing granular suspensions

Cited by in corpus (11)

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• Flow of wet granular materials: a numerical study
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• Liquid morphologies and capillary forces between three spherical beads
• Rheology of weakly wetted granular materials - a comparison of experimental and numerical data
• Grain Scale Modeling of Arbitrary Fluid Saturation in Random Packings
• Micro-mechanical Failure Analysis of Wet Granular Matter
• The Role of Contact Angle Hysteresis for Fluid Transport in Wet Granular Matter
• Tensile Stress Relaxation in Unsaturated Granular Materials
• Shear strength of wet granular materials: macroscopic cohesion and effective stress