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Theoretical study on the translation and rotation of an elliptic camphor particle

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Title: Theoretical study on the translation and rotation of an elliptic camphor particle
Authors: Iida, Keita Browse this author
Kitahata, Hiroyuki Browse this author →KAKEN DB
Nagayama, Masaharu Browse this author →KAKEN DB
Keywords: Surfactant-water system
Reaction-diffusion system
Bifurcation theory
Perturbation theory
Issue Date: 1-Apr-2014
Publisher: Elsevier
Journal Title: Physica. D, Nonlinear phenomena
Volume: 272
Start Page: 39
End Page: 50
Publisher DOI: 10.1016/j.physd.2014.01.005
Abstract: The spontaneous motion of an elliptic camphor particle floating on water is studied theoretically and experimentally. Considering a mathematical model for the motion of an elliptic camphor particle in a two-dimensional space, we first investigate the asymptotic solutions with numerical computation. We then introduce a small parameters into the definition of the particle shape, which represents an elliptic deformation from a circular shape and, by means of perturbation theory, we analytically calculate the travelling solution to within O(epsilon). The results show that short-axis-directed travelling solutions primarily bifurcate from stationary solutions and that long-axis-directed ones are secondary which means that elliptic camphor particles are easier to move in the short-axis direction. Furthermore, we show that rotating solutions bifurcate from stationary solutions and that the bifurcation point changes with 0(82), which suggests that elliptic camphor disks easily exhibit translational motion, rather than rotational, within the small deformation. Finally, our theoretical suggestions are confirmed by an experiment.
Type: article (author version)
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長山 雅晴

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