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arXiv 2403.10643physics.flu-dyn
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具有两个对称平面的物体的沉降动力学

Sedimentation Dynamics of Bodies with Two Planes of Symmetry

Harshit Joshi, Rama Govindarajan

AI总结:

研究无惯性条件下具有两个对称平面物体的沉降行为,依据形状将其分为沉降体、漂移体和颤振体,并通过边界积分法验证三类物体均存在于所设计集合中。

摘要:

我们证明,具有两个对称平面的物体即使在没有惯性的情况下也能表现出一系列行为。任何此类物体在其动力学中都支持一个守恒量,并且仅取决于其形状,它要么是沉降体、漂移体,要么是颤振体。在长时间尺度上,沉降体和漂移体分别垂直和倾斜下落,而颤振体则在执行复杂模式的同时永远旋转。颤振体的动力学解耦为具有不同时间尺度的周期部分和 Floquet 部分,从而产生周期性或准周期性。我们设计了一组物体,并使用边界积分法证明沉降体、漂移体和颤振体都位于该组中。

英文摘要:

We show that bodies with two planes of symmetry can display a range of behaviors even without inertia. Any such body supports a conserved quantity in its dynamics, and is either a settler, a drifter or a flutterer, depending only on its shape. At large time, settlers and drifters, respectively, fall vertically and obliquely, while flutterers rotate forever while executing intricate patterns. The dynamics of flutterers decouples into a periodic and a Floquet part with different timescales, giving periodicity or quasiperiodicity. We design a set of bodies and use the boundary integral method to show that settlers, drifters, and flutterers, all lie in this set.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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