title: Spontaneous motion of a droplet coupled with a chemical wave.
abstract: We propose a framework for the spontaneous motion of a droplet coupled with internal dynamic patterns generated in a reaction-diffusion system. The spatiotemporal order of the chemical reaction gives rise to inhomogeneous surface tension and results in self-propulsion driven by the surrounding flow due to the Marangoni effect. Numerical calculations of internal patterns together with theoretical results of the flow fields at low Reynolds number reproduce well the experimental results obtained using a droplet of the Belousov-Zhabotinsky reaction medium.
authors.affiliation: Department of Physics, Graduate School of Science, Chiba University, Chiba, Japan. kitahata@physics.s.chiba-u.ac.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kitahata
authors.forename: Natsuhiko
authors.initials: N
authors.lastname: Yoshinaga
authors.forename: Ken H
authors.initials: KH
authors.lastname: Nagai
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sumino
mesh_terms: D057446:Hydrodynamics; D008962:Models, Theoretical; D009038:Motion