Coating-induced lubrication in granular media: from particle-scale tribology to bulk rheology

Key Points

• This research aims to investigate how coatings influence the behavior and flow properties of granular materials.
• Conducted tribology and rheology experiments to analyze the properties of coated granular materials.
• Utilized discrete element method (DEM) simulations to model interactions at the particle level.
• Employed mean-field modeling to study overall rheological behavior of the bulk material.
• Polymer coatings significantly modify the flow behavior of granular materials, enhancing lubrication.
• Experimental and simulation results indicate a marked change in rheological properties due to coatings.