Large-scale descriptions of densely packed soft particles under drive

A broad class of soft matter systems, ranging from sheared emulsions or microgels to cell monolayers, may be considered as densely packed soft particles under drive, the latter being either a boundary drive or active forces at particle scale. In this talk, I'll first show how a macroscopic description in terms of stress tensor can be derived from particle dynamics for jammed soft disks under shear. Then turning to dense monolayers of self-propelled soft particles, I'll discuss how a persistent particle motility couples to the collective elastic modes to produce large-scale swirl-like motions.

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