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Title: Communication: Mode bifurcation of droplet motion under stationary laser irradiation

The self-propelled motion of a mm-sized oil droplet floating on water, induced by a local temperature gradient generated by CW laser irradiation is reported. The circular droplet exhibits two types of regular periodic motion, reciprocal and circular, around the laser spot under suitable laser power. With an increase in laser power, a mode bifurcation from rectilinear reciprocal motion to circular motion is caused. The essential aspects of this mode bifurcation are discussed in terms of spontaneous symmetry-breaking under temperature-induced interfacial instability, and are theoretically reproduced with simple coupled differential equations.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
  2. (Japan)
  3. Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394 (Japan)
Publication Date:
OSTI Identifier:
22419974
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BIFURCATION; DIFFERENTIAL EQUATIONS; DROPLETS; LASER RADIATION; LASERS; OILS; SYMMETRY BREAKING; TEMPERATURE GRADIENTS