演講公告

演講主題：Chaotic tumbling motion in the Quincke rotor dynamics
主講人：胡偉帆教授(中興大學應數系)
演講日期：2019年3月26日(星期二) 14:00 –15:00
演講地點：(光復校區) 科學一館223室
茶會時間：當天下午1:30 (科學一館205室)
摘要內容：
Abstract. In this talk, we study the dynamics of a particle immersed in a weakly conducting fluid under the influence of external uniform electric field. The leaky dielectric model is adopted to describe the electric field and the fluid motion equation governing by the Stokes equations is highlighted to model the particle electrohydrodynamics. Our theoretical analysis for predicting the spontaneous Quincke rotation of a circular particle is exactly consistent with the result obtained from the classic Quincke models. For a shape-anisotropic particle, our numerical result shows that the particle can undergo complicated dynamics compared to circular particles. In particular, we find that the shape anisotropy provides a source of nonlinearity leading to chaotic tumbling motion, while such chaos occurs through a period-doubling cascade of the particle angular velocity.
相關檔案：Talk_1080326.pdf

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