Dynamics of flexible fibers in shear flow.
Dynamics of flexible fibers in shear flow.
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DOI：
10.1063/1.4931598
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发表时间：
2014-11
期刊：
影响因子：
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通讯作者：
A. Słowicka;E. Wajnryb;M. Ekiel-Jeżewska
中科院分区：
文献类型：
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作者：
A. Słowicka;E. Wajnryb;M. Ekiel-Jeżewska
数值分析了低雷诺数下柔性非布朗纤维在剪切流动中的动力学特性，并对纤维弯曲力与粘滞阻力的比值a进行了数值计算。最初，纤维与气流对齐，然后在垂直于气流涡度的平面上移动。当系统地改变A的值时，可以观察到不同模态的丰富谱，包括在盘绕模态和拉直模态之间的急剧转变，从周期解到迁移解的倍周期分岔，不规则动力学和混沌。
Dynamics of flexible non-Brownian fibers in shear flow at low-Reynolds-number are analyzed numerically for a wide range of the ratios A of the fiber bending force to the viscous drag force. Initially, the fibers are aligned with the flow, and later they move in the plane perpendicular to the flow vorticity. A surprisingly rich spectrum of different modes is observed when the value of A is systematically changed, with sharp transitions between coiled and straightening out modes, period-doubling bifurcations from periodic to migrating solutions, irregular dynamics, and chaos.