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首页> 外文期刊>Plasma physics and controlled fusion >Tracer particle trapping times in pressure-gradient-driven turbulence in toroidal geometry and their connection to the dynamics of large-scale cycles
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Tracer particle trapping times in pressure-gradient-driven turbulence in toroidal geometry and their connection to the dynamics of large-scale cycles

机译:环形几何体中由压力梯度驱动的湍流中的示踪剂粒子捕获时间及其与大规模循环动力学的联系

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摘要

The continuous time random walk (CTRW) approach allows us to construct transport models based on waiting times and particle flight distributions. The connection between the distribution of particle flights and the distribution of radial extents of the connected components of the flow has already been shown by Garcia et al (2009 Phys. Rev. E 80 046410). Here, the connection between the large-scale cycles of the flow structure and the trapping times is explored. It is shown that the distribution of trapping times of the tracers is given by the distribution of lifetimes of the large-scale cycles in the flow structure. This distribution has a power tail, which is the result of the dynamics of avalanche transport.
机译:连续时间随机行走(CTRW)方法使我们能够根据等待时间和粒子飞行分布来构建运输模型。 Garcia等人(2009 Phys。Rev. E 80 046410)已经显示了粒子飞行的分布与流的连接部分的径向范围的分布之间的联系。在此,探讨了流动结构的大规模循环与捕集时间之间的联系。结果表明,示踪剂的俘获时间的分布由流动结构中大型循环寿命的分布给出。这种分布具有能量尾巴,这是雪崩传输动力学的结果。

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