41 citations · 239 across the 22 of their papers we have counts for
9 papers · 1 filter
Energetics-based model for a diffusiophoretic motion of a deformable droplet
Hiroyuki Kitahata, Yuki Koyano, Yasuaki Kobayashi +1
We construct a mathematical model for a diffusiophoretic motion of a deformable droplet, which is floating on a liquid surface and is driven by the surface tension gradient origina…
Mathematical modeling for the synchronization of two interacting active rotors
Hiroyuki Kitahata, Yuki Koyano
We investigate the synchronization of active rotors. A rotor is composed of a free-rotating arm with a particle that releases a surface-active chemical compound. It exhibits self-r…
Imperfect bifurcation in the rotation of a propeller-shaped camphor rotor
Yuki Koyano, Hiroyuki Kitahata
We investigated the bifurcation structure on the self-propelled motion of a camphor rotor at a water surface. The center of the camphor rotor was fixed by the axis, and it showed r…
Diffusion enhancement in a levitated droplet via oscillatory deformation
Yuki Koyano, Hiroyuki Kitahata, Koji Hasegawa +5
Recent experimental results indicate that mixing is enhanced by a reciprocal flow induced inside a levitated droplet with an oscillatory deformation [T. Watanabe et al. Sci. Rep. 8…
Spontaneous motion of a camphor particle with a triangular modification from a circle
Hiroyuki Kitahata, Yuki Koyano
The spontaneous motion of a camphor particle with a slight modification from a circle is investigated. The effect of the shape on the motion is examined by the perturbation method.…
Two floating camphor particles interacting through lateral capillary force
Yuhei Hirose, Yusuke Yasugahira, Mamoru Okamoto +4
We consider a mathematical model for a two-particle system driven by the spatial gradient of a concentration field of chemicals with conservative attractive interactions in one dim…
Oscillatory Motion of a Camphor Grain in a One-Dimensional Finite Region
Yuki Koyano, Tatsunari Sakurai, Hiroyuki Kitahata
The motion of a self-propelled particle is affected by its surroundings, such as boundaries or external fields. In this paper, we investigated the bifurcation of the motion of a ca…
Oscillation of a Rotating Levitated Droplet: Analysis with a Mechanical Model
Hiroyuki Kitahata, Rui Tanaka, Yuki Koyano +7
A droplet of millimeter-to-centimeter scale can exhibit electrostatic levitation, and such levitated droplets can be used for the measurement of the surface tension of the liquids…
General Criteria for Determining Rotation or Oscillation in a Two-dimensional Axisymmetric System
Yuki Koyano, Natsuhiko Yoshinaga, Hiroyuki Kitahata
A self-propelled particle in a two-dimensional axisymmetric system, such as a particle in a central force field or confined in a circular region, may show rotational or oscillatory…