Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics

被引：1

作者：

Ogata, D. ^{[1
]}

Newman, D. E. ^{[1
]}

Sanchez, R. ^{[2
]}

机构：

[1] Univ Alaska, Dept Phys, Fairbanks, AK 99775 USA

[2] Univ Carlos III, Dept Fis, Leganes 28911, Madrid, Spain

来源：

PHYSICS OF PLASMAS | 2017年 / 24卷 / 07期

关键词：

2-NONLINEARITY MODEL; SHEAR-FLOW; DIFFUSION; PARTICLES; KINETICS;

D O I：

10.1063/1.4993209

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：

The reduction of turbulent transport across sheared flow regions has been known for a long time in magnetically confined toroidal plasmas. However, details of the dynamics are still unclear, in particular, in what refers to the changes caused by the flow on the nature of radial transport itself. In Paper II, we have shown in a simplified model of drift wave turbulence that, when the background profile is allowed to evolve self-consistently with fluctuations, a variety of transport regimes ranging from superdiffusive to subdiffusive open up depending on the properties of the underlying turbulence [D. Ogata et al., Phys. Plasmas 24, 052307 (2017)]. In this paper, we show that externally applied sheared flows can, under the proper conditions, cause the transport dynamics to be diffusive or subdiffusive. Published by AIP Publishing.

引用

页数：10