Soft Matter Seminar: Flows of granular matter
Dr. Anton Peshkov, University of Maryland
In the first part of the presentation I will speak about the rheology of active granular particles. Using molecular dynamic simulations, we show that activity can dramatically affect the rheological properties of particles even without hydrodynamic interactions. Activity drastically reduces the friction of the system and at high values of activity a phase transitions take place: from the rheology of a granular system with a yield stress to that of a Newtonian fluid.
The second part of the presentation will be devoted to the reversibility of the motion of granular particles. Using experiments with index matched particles, we study the translations and rotations of particles under cyclic compression. We find that at low amplitude of compression, the translational motion of particles is reversible, while rotational is not. We try to explain this phenomenon by studying the contacts dynamic of the system.
Friday, April 5 at 11:00am
Regents Hall, 351
3700 O St. NW