title: Spontaneous motion and deformation of a self-propelled droplet.
abstract: The time evolution equation of motion and shape are derived for a self-propelled droplet driven by a chemical reaction. The coupling between the chemical reaction and motion makes an inhomogeneous concentration distribution as well as a surrounding flow leading to the instability of a stationary state. The instability results in spontaneous motion by which the shape of the droplet deforms from a sphere. We found that the self-propelled droplet is elongated perpendicular to the direction of motion and is characterized as a pusher.
authors.affiliation: WPI, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Natsuhiko
authors.initials: N
authors.lastname: Yoshinaga