講演情報
[O09-P03]Bifurcation phenomena of the Rotating Camphor particle★Invited Papers
*下川 倫子1、本間 真、北畑 裕之2 (1.奈良女子大学、2.千葉大学)
Studies on camphor boats, which spontaneously move on the water surface due to interfacial tension differences, is actively pursued as an experiments that mimic collective motions of living organisms. This presentation reports on experimental research focusing on the rotational motion of camphor boats.
A camphor boat is made by attaching a camphor grain to one end of a thin rod of plastic sheet, and fixing the other end of the rotational axis. When the camphor boat is floated on water, it exhibits steady rotational motion. Varying the length of the rod results in different behaviours, such as stationary motion, intermittent motion and steady rotational motion. The transition on these motions are treated as bifurcations. Based on detailed experimental results, we propose a phenomenological model to explain the dynamics of the rotational behavior and discuss the stability of the bifurcation phenomena. Comparing the experimental results with those obtained from the phenomenological model provides the consideration that diverse rotational behaviors emerge depending on the rod length due to the balance between arising from the frictional force at the rod and the driving force due to interfacial tension differences around the camphor particle.
A camphor boat is made by attaching a camphor grain to one end of a thin rod of plastic sheet, and fixing the other end of the rotational axis. When the camphor boat is floated on water, it exhibits steady rotational motion. Varying the length of the rod results in different behaviours, such as stationary motion, intermittent motion and steady rotational motion. The transition on these motions are treated as bifurcations. Based on detailed experimental results, we propose a phenomenological model to explain the dynamics of the rotational behavior and discuss the stability of the bifurcation phenomena. Comparing the experimental results with those obtained from the phenomenological model provides the consideration that diverse rotational behaviors emerge depending on the rod length due to the balance between arising from the frictional force at the rod and the driving force due to interfacial tension differences around the camphor particle.