Abstract
Mitsusuke Tarama: „Dynamics of a self-propelled soft particle under external forcing”
Kyoto University, Japan
In this seminar, I'd like to talk about our research on the dynamics of a self-propelled soft particle under external forcing in a two-dimensional space. Our analysis is based on the model equations derived from the symmetry argument for the velocity of the centre of mass and a tensor variable characterizing deformation. Here, we consider two types of external force. One is a gravitational force, which enters additively into the time-evolution equation of the velocity vector. The other is an electric force supposing that a dipole moment is induced in the particle. This force affects the time-evolution equation of the deformation tensor. We have carried out numerical simulations of the time-evolution equations. As a result, a variety of dynamical states and dynamical phase diagram are obtained by changing the magnitude of the external force. Theoretical analysis has also been developed to reproduce some of the bifurcations.
Ref: M. Tarama and T. Ohta, Eur. Phys. J. B 83, 391-400 (2011)