Institut für Plasmaforschung, Universität Stuttgart, D-70569 Stuttgart, Germany.
Phys Rev Lett. 2009 Oct 16;103(16):165004. doi: 10.1103/PhysRevLett.103.165004.
The energetic interaction between drift-wave turbulence and zonal flows is studied experimentally in two-dimensional wave number space. The kinetic energy is found to be transferred nonlocally from the drift waves to the zonal flow. This confirms the theoretical prediction that the parametric-modulational instability is the driving mechanism of zonal flows. The physical mechanism of this nonlocal energetic interaction between and zonal flows and turbulent drift-wave eddies in relation to the suppression of turbulent transport is discussed.
实验研究了二维波数空间中漂移波湍流与行星波之间的能量相互作用。发现动能从漂移波非局域地传递到行星波。这证实了理论预测，即参量调制不稳定性是行星波形成的驱动机制。讨论了这种与湍流输运抑制有关的行星波和湍流漂移波涡旋之间的非局域能量相互作用的物理机制。
