Penta-hepta defect chaos in a model for rotating hexagonal convection.
Penta-hepta defect chaos in a model for rotating hexagonal convection.
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旋转六边形对流模型中的五七缺陷混沌。
DOI：
10.1103/physrevlett.90.134502
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发表时间：
2002
影响因子：
8.6
通讯作者：
Hermann Riecke
中科院分区：
文献类型：
--
作者：
Y. Young;Hermann Riecke
在具有平均流量的旋转非boussinesq对流模型中，我们确定了一个基于六边形平台的时空混沌体系，该体系由五七缺陷诱导的位错成核维持。缺陷数的概率分布函数与通常观察到的泊松型分布有很大的偏差。这意味着缺陷以密度依赖的形式产生和缺陷的湮灭率之间存在很强的相关性。我们从分布函数中提取这些速率，也直接从缺陷动力学中提取。
In a model for rotating non-Boussinesq convection with mean flow, we identify a regime of spatiotemporal chaos that is based on a hexagonal planform and is sustained by the induced nucleation of dislocations by penta-hepta defects. The probability distribution function for the number of defects deviates substantially from the usually observed Poisson-type distribution. It implies strong correlations between the defects in the form of density-dependent creation and annihilation rates of defects. We extract these rates from the distribution function and also directly from the defect dynamics.