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Updated: Apr 7, 2026

Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence
Published on: June 24, 2016
General criteria for determining rotation or oscillation in a two-dimensional axisymmetric system
Yuki Koyano1, Natsuhiko Yoshinaga2, Hiroyuki Kitahata1
1Department of Physics, Graduate School of Science, Chiba University, Chiba 263-8522, Japan.
Abstract:
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 motion. These motions do not require asymmetry of the particle or the boundary, but arise through spontaneous symmetry breaking. We propose a generic model for a self-propelled particle in a two-dimensional axisymmetric system. A weakly nonlinear analysis establishes criteria for determining rotational or oscillatory motion.
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