Sharma Jyoti, Tiwari Ishant, Parmananda P, Rivera M
Department of Physics, Indian Institute of Technology-Bombay, Powai, Mumbai, Maharashtra 400076, India.
Centro de Investigación en Ciencias-(IICBA), UAEM, Avenida Universidad 1001, 62209 Cuernavaca, Morelos, Mexico.
Phys Rev E. 2022 Jan;105(1-1):014216. doi: 10.1103/PhysRevE.105.014216.
We report experiments on an active camphor rotor. A camphor rotor is prepared by infusing camphor on a regular rectangular paper strip. It performs self-propelled motion at the air-water interface due to Marangoni driven forces. After some transient (periodic) dynamics, the rotor enters into the aperiodic bursting regime, which is characterized as an irregularly repeated rest (halt) and run (motion) of the rotor. Subsequently, this aperiodic (irregular) rotor is entrained to a periodic (regular) regime with the help of a suitable external periodic forcing. Furthermore, we conducted experiments on two such coupled aperiodic camphor rotors. In this set of experiments, synchronized bursting was observed. During this bursting motion, one rotor follows the movement of the other rotor. A numerical point particle model, incorporating excitable underlying equations, successfully replicated experimentally observed aperiodic bursting.
我们报告了关于主动樟脑转子的实验。通过将樟脑注入规则的矩形纸条来制备樟脑转子。由于马兰戈尼驱动力，它在空气 - 水界面处进行自推进运动。经过一些瞬态（周期性）动力学过程后，转子进入非周期性爆发状态，其特征是转子不规则地重复静止（停止）和运行（运动）。随后，借助合适的外部周期性强迫，这个非周期性（不规则）转子被带入周期性（规则）状态。此外，我们对两个这样耦合的非周期性樟脑转子进行了实验。在这组实验中，观察到了同步爆发。在这种爆发运动期间，一个转子跟随另一个转子的运动。一个包含可激发基础方程的数值点粒子模型成功地复制了实验观察到的非周期性爆发。
