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arXiv 0804.2520nlin.CD
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混沌混合模式的拓扑

Topology of Chaotic Mixing Patterns

Jean-Luc Thiffeault, Matthew D. Finn, Emmanuelle Gouillart, Toby Hall

摘要:

由杆的周期性运动组成的搅拌装置引起流体域到其自身的映射,其可以被视为穿孔表面的同胚。使棒经历拓扑复杂的运动保证了至少最小量的材料线拉伸,这对于混沌混合是重要的。我们使用拓扑的考虑来描述未混合的材料注入到一个中央混合区域,这发生在注射尖点的性质。拓扑指数公式使我们能够预测可能出现的不稳定叶理的类型为固定数量的杆。

英文摘要:

A stirring device consisting of a periodic motion of rods induces a mapping of the fluid domain to itself, which can be regarded as a homeomorphism of a punctured surface. Having the rods undergo a topologically-complex motion guarantees at least a minimum amount of stretching of material lines, which is important for chaotic mixing. We use topological considerations to describe the nature of the injection of unmixed material into a central mixing region, which takes place at injection cusps. A topological index formula allow us to predict the possible types of unstable foliations that can arise for a fixed number of rods.

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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