Chen Yong-Jun, Nagamine Yuko, Yoshikawa Kenichi
Department of Physics, Graduate School of Science, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Jul;80(1 Pt 2):016303. doi: 10.1103/PhysRevE.80.016303. Epub 2009 Jul 6.
We report the generation of directed self-propelled motion of a droplet of aniline oil with a velocity on the order of centimeters per second on an aqueous phase. It is found that, depending on the initial conditions, the droplet shows either circular or beeline motion in a circular Petri dish. The motion of a droplet depends on volume of the droplet and concentration of solution. The velocity decreases when volume of the droplet and concentration of solution increase. Such unique motion is discussed in terms of Marangoni-driven spreading under chemical nonequilibrium. The simulation reproduces the mode of motion in a circular Petri dish.
我们报道了在水相上苯胺油滴产生的定向自推进运动，其速度可达每秒几厘米。结果发现，根据初始条件，液滴在圆形培养皿中呈现圆周运动或直线运动。液滴的运动取决于液滴的体积和溶液的浓度。当液滴体积和溶液浓度增加时，速度会降低。这种独特的运动是根据化学非平衡下的马兰戈尼驱动扩散来讨论的。模拟再现了圆形培养皿中的运动模式。
