Quantitatively mimicking wet colloidal suspensions with dry granular media

Rene Messina (1) , Sarah Aljawhari (1) , Lydiane Bécu (1) , Julien Schockmel (2) , Geoffroy Lumay (2) , Nicolas Vandewalle (3)

1 LCP-A2MC - Laboratoire de Chimie et Physique - Approche Multi-échelle des Milieux Complexes
2 GRASP - Departement de Physique
3 GRASP - Group for Research and Applications in Statistical Physics

Athermal two-dimensional granular systems are exposed to external mechanical noise leading to Brownian-like motion. Using tunable repulsive interparticle interaction, it is shown that the same microstructure as that observed in colloidal suspensions can be quantitatively recovered at a macroscopic scale. To that end, experiments on granular and colloidal systems made up of magnetized particles as well as computer simulations are performed and compared. Excellent agreement throughout the range of the magnetic coupling parameter Gamma is found for the pair distribution as well as the bond-orientational correlation functions. This finding opens new ways to efficiently and very conveniently explore phase transitions, crystallization, nucleation, etc in confined geometries.

Mots clés: Particles

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Rene Messina, Sarah Aljawhari, Lydiane Bécu, Julien Schockmel, Geoffroy Lumay, et al.. Quantitatively mimicking wet colloidal suspensions with dry granular media. Scientific Reports, 2015, 5, pp.10348. ⟨10.1038/srep10348⟩. ⟨hal-01515840⟩