Regensburg 2016 – scientific program
BP 47.2: Poster
Wednesday, March 9, 2016, 17:00–19:00, Poster C
Dynamical density functional theory for hard, active disks — •Josua Grawitter and Holger Stark — Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin, Germany
We study a collection of self-propelled, active particles using a modified dynamical density functional theory (DDFT) in two dimensions. DDFT provides an ensemble description of hard-sphere interactions in colloidal systems. It therefore gives insight into statistical properties which would otherwise require extensive Brownian dynamics simulation.
When active particles are placed in a harmonic trapping potential, we observe nonequilibrium steady states, which were previously noted by Pototsky and Stark using different methods . Switching to the co-moving and -rotating reference frame of a single particle produces the radial-orientational distribution function of the liquid. Using this model, we can statistically predict the relative orientations and positions of active particles close to each other.
 A. Pototsky and H. Stark, Europhys. Lett. 98, 50004 (2012).