The role of the Kubo number in two-component turbulence

	The role of the Kubo number in two-component turbulence
	Qin, G.1 ; Shalchi, A.2
刊名	PHYSICS OF PLASMAS
	2013-09-01
卷号	20 期号:9 页码:09302
ISSN号	1070-664X
通讯作者	北京8701信箱
中文摘要	We explore the random walk of magnetic field lines in two-component turbulence by using computer simulations. It is often assumed that the two-component model provides a good approximation for solar wind turbulence. We explore the dependence of the field line diffusion coefficient on the Kubo number which is a fundamental and characteristic quantity in the theory of turbulence. We show that there are two transport regimes. One is the well-known quasilinear regime in which the diffusion coefficient is proportional to the Kubo number squared, and the second one is a nonlinear regime in which the diffusion coefficient is directly proportional to the Kubo number. The so-called percolative transport regime which is often discussed in the literature cannot be found. The numerical results obtained in the present paper confirm analytical theories for random walking field lines developed in the past.
英文摘要	We explore the random walk of magnetic field lines in two-component turbulence by using computer simulations. It is often assumed that the two-component model provides a good approximation for solar wind turbulence. We explore the dependence of the field line diffusion coefficient on the Kubo number which is a fundamental and characteristic quantity in the theory of turbulence. We show that there are two transport regimes. One is the well-known quasilinear regime in which the diffusion coefficient is proportional to the Kubo number squared, and the second one is a nonlinear regime in which the diffusion coefficient is directly proportional to the Kubo number. The so-called percolative transport regime which is often discussed in the literature cannot be found. The numerical results obtained in the present paper confirm analytical theories for random walking field lines developed in the past. (C) 2013 AIP Publishing LLC.
学科主题	空间物理
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Fluids & Plasmas
研究领域[WOS]	Physics
关键词[WOS]	SOLAR-WIND TURBULENCE ; MAGNETIC-FIELD LINES ; RANDOM-WALK ; MAGNETOHYDRODYNAMIC TURBULENCE ; PERCOLATIVE REGIMES ; FLUCTUATIONS ; TRANSPORT ; DIFFUSION ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000325399400030
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1512]
专题	国家空间科学中心_空间科学部
作者单位	1.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China 2.Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada
推荐引用方式 GB/T 7714	Qin, G.,Shalchi, A.. The role of the Kubo number in two-component turbulence[J]. PHYSICS OF PLASMAS,2013,20(9):09302.
APA	Qin, G.,&Shalchi, A..(2013).The role of the Kubo number in two-component turbulence.PHYSICS OF PLASMAS,20(9),09302.
MLA	Qin, G.,et al."The role of the Kubo number in two-component turbulence".PHYSICS OF PLASMAS 20.9(2013):09302.