Cohesive Granular Materials, Description and Flowing Properties

Invited Lecturers

Blanche Dalloz (Aix-Marseille University, France)

with Maxime Nicolas
5 lectures on: Introduction: cohesive powders in the natural and industrial worlds. Basics on granular materials: an overview on statics, flow and rheology. Experimental techniques for cohesion-controlled particles. The inclined plane as a cohesion stress measurement tool. Introduction to DEM simulations with LIGGGHTS.


Cyprien Gay (University Paris Diderot, France)

6 lectures on: basics of isotropic elasticity; adhesion; introduction to capillarity; introduction to adhesion mediated by soft media; interactions between grains embedded in soft matrix; Shear forces; introduction to more detailed kinematics (grain rotation, micropolar media); Soft "granular media" (bubbles, bubbly liquids, liquid foams, wet liquid foams); biological tissues.


Pierre Jop (CNRS-Saint-Gobain, Aubervilliers, France)

6 lectures on: Several aspects inspired by industrial applications involving cohesive particles will be discussed. Flows of particles that can melt (sintering in rotary kiln, flow evolution with time), compression of powders (flow rules, evolution of the structure), mixing issues for grains and liquids (spreading of the liquid, control of the segregation), granulation processes (energy balance, wet granulation).


Geoffroy Lumay (University of Liege, Belgium)

6 lectures on: Effect of the cohesive forces on the powder behaviour (experimental approach). Effect on the packing; Effect of cohesive forces on the flowing properties. The rotating drum and the cohesiveness. Combined effects of capillary and electrostatic forces. Role of typical additives (fumed silica, mesoporous silica, stearate, …) on the different cohesive forces.


Maxime Nicolas (Aix-Marseille University, France)

with Blanche Dalloz
5 lectures on: Introduction: cohesive powders in the natural and industrial worlds. Basics on granular materials: an overview on statics, flow and rheology. Experimental techniques for cohesion-controlled particles. The inclined plane as a cohesion stress measurement tool. Introduction to DEM simulations with LIGGGHTS.


Massimo Poletto (University of Salerno, Italy)

6 lectures on: Origins and motivations in powder flow properties characterization in terms of shear testing for industrial purposes. Strengths and limits for shear testing. Direct and indirect shear testers: the different shear testing. Static and dynamic testers for powder flow properties. Shear testing under process conditions. Some examples of use of powder shear testers to estimate interparticle cohesive forces. Examples shear testing results to estimate the natural agglomeration of cohesive powders in aerated discharge and fluidization. The use of powder rheometers with fine and cohesive powders and their relations with shear testing results: the impor- tance of the rheometer geometry. Potential of powder rheometers in modern applications.


Marco Ramaioli (University of Surrey, UK)

6 lectures on: moisture transfer and cohesion in amorphous materials. Sorption isotherms, water diffusion, glass transition: effect on mechanical properties. Sintering and caking of powders : effect on flow properties. Industrial applications relevant to pharma and food: dosing of cohesive powders, dispersing powders in a liquid, texturisation processes to improve flow properties.


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