Wet granular flow control through liquid induced cohesion
arXiv:1801.02454 · doi:10.1016/j.powtec.2018.02.045
Abstract
Liquid has a significant effect on the flow of wet granular assemblies. We explore the effects of liquid induced cohesion on the flow characteristics of wet granular materials. We propose a cohesion-scaling approach that enables invariant flow characteristics for different particles sizes in rotating drums. The strength of capillary forces between the particles is significantly reduced by making the glass beads hydrophobic via chemical silanization. Main results of rotating drum experiments are that liquid-induced cohesion decreases both the width of the flowing region and the velocity of the particles at the free surface, but increases the width of the creeping region as well as the dynamic angle of repose. Also, the local granular temperature in the flowing region decreases with an increase of the capillary force. The scaling methodology in the flow regimes considered (rolling and cascading regimes) yields invariant bed flow characteristics for different particle sizes.
Reviewed with minor comments and resubmitted to Powder Technology. 35 pages, 20 figures
References in corpus (8)
- Smoothed Particle Hydrodynamics and Magnetohydrodynamics
- Maximum Angle of Stability of a Wet Granular Pile
- The S shape of a granular pile in a rotating drum
- Experimental velocity fields and forces for a cylinder penetrating into a granular medium
- Rheology of weakly wetted granular materials - a comparison of experimental and numerical data
- Lubrication effects on the flow of wet granular materials
- Steady Flow Dynamics during Granular Impact
- From splashing to bouncing: the influence of viscosity on the impact of suspension droplets on a solid surface