Modeling liquid migration in active swollen gel spheres.

Liquid migration in active soft solids is a very common phenomenon in Nature at different scales: from cells to leaves. It can be caused by mechanical as well as chemical actions. The work focuses on the migration of liquid provoked by remodeling processes in an active impermeable gel sphere. Within this context, we present a consistent mathematical theory capable to gain a deep understanding of the phenomenon in both steady and transient conditions.