Up-gradient particle flux in a drift wave-zonal flow system
Up-gradient particle flux in a drift wave-zonal flow system
复制标题
漂移波分区流系统中的梯度粒子通量
DOI：
10.1063/1.4921671
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发表时间：
2015
影响因子：
2.2
通讯作者：
C. Brandt
中科院分区：
文献类型：
--
作者：
L. Cui;G. Tynan;P. Diamond;S. C. Thakur;C. Brandt
我们报告了一个净向内，向上梯度湍流粒子通量在圆柱形等离子体碰撞漂移波产生足够强的剪切方位流，驱动正（负）密度波动向上（向下）的背景密度梯度，导致陡峭的平均密度梯度。结果表明，漂移湍流驱动的剪切流存在饱和机制，可导致颗粒输运和密度剖面陡峭的梯度。
We report a net inward, up-gradient turbulent particle flux in a cylindrical plasma when collisional drift waves generate a sufficiently strong sheared azimuthal flow that drives positive (negative) density fluctuations up (down) the background density gradient, resulting in a steepening of the mean density gradient. The results show the existence of a saturation mechanism for drift-turbulence driven sheared flows that can cause up-gradient particle transport and density profile steepening.