Dynamics of a deformable self-propelled particle under external forcing

作者：Tarama M^*; Ohta T

来源：European Physical Journal B, 2011, 83(3): 391-400.

DOI：10.1140/epjb/e2011-20307-7

We investigate dynamics of a deformable self-propelled particle under external fields in two dimensions based on the time-evolution equations for the center of mass and a tensor variable characterizing deformations. We consider two kinds of external force. One is a gravitational force which enters additively in the time-evolution equation for the center of mass. The other is an electric force supposing that a dipole moment is induced in the particle. This force is added to the equation for the deformation tensor. It is shown that a rich variety of dynamics appears by changing the strength of the forces and the migration velocity of a self-propelled particle. A theoretical analysis is carried out to clarify the dynamics and the bifurcations.

• 出版日期2011-10