Up-gradient particle flux in a drift wave-zonal flow system

被引：20
作者：
Cui, L. [1 ,2 ]
Tynan, G. R. [1 ,2 ]
Diamond, P. H. [1 ,3 ,4 ]
Thakur, S. C. [1 ,2 ]
Brandt, C. [2 ]
机构：
[1] Univ Calif San Diego, Ctr Momentum Transport & Flow Org, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA
[3] Univ Calif San Diego, CASS, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
来源：
PHYSICS OF PLASMAS | 2015年 / 22卷 / 05期
关键词：
ELECTRIC-FIELDS; TRANSPORT; PLASMA; CONVECTION; TURBULENCE; BOUNDARY;
D O I：
10.1063/1.4921671
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
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. (C) 2015 Author(s).
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页数：5
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