On the nature of bursting in transport and turbulence in drift wave–zonal flow systems
On the nature of bursting in transport and turbulence in drift wave–zonal flow systems
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DOI：
10.1063/1.1415424
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发表时间：
2001-11
影响因子：
2.2
通讯作者：
M. Malkov;P. Diamond;M. Rosenbluth
中科院分区：
文献类型：
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作者：
M. Malkov;P. Diamond;M. Rosenbluth
给出了漂移波-纬向流湍流耦合谱动力学的扩展捕食-被捕食模型的预测结果。根据系统参数的不同，该模型给出了三种可能的依赖于时间的解：(1)输运和湍流强度水平的准周期爆发；(2)振荡弛豫到定态，并且在无碰撞极限下；(3)强度脉冲，然后是纬向流饱和。这些解与最近在全球陀螺动力学模拟中观察到的依赖时间的行为是一致的。
The predictions of the extended predator–prey model of the coupled spectral dynamics of drift wave–zonal flow turbulence are presented. The model exhibits three possible types of time-dependent solutions, depending on system parameters, which are: (1) quasiperiodic bursting of the transport and turbulence intensity levels; (2) oscillatory relaxation to a stationary state, and in the collisionless limit; (3) an intensity pulse followed by saturation of zonal flow. These solutions are consistent with the time dependent behavior recently observed in the global gyrokinetic simulations.