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The role of the Kubo number in two-component turbulence
Qin, G.1; Shalchi, A.2; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationPHYSICS OF PLASMAS
2013-09-01
Volume20Issue:9Pages:09302
ISSN1070-664X
Language英语
AbstractWe 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.; 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.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1512
Collection空间科学部
Corresponding Author北京8701信箱
Affiliation1.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
Recommended Citation
GB/T 7714
Qin, G.,Shalchi, A.,北京8701信箱. The role of the Kubo number in two-component turbulence[J]. PHYSICS OF PLASMAS,2013,20(9):09302.
APA Qin, G.,Shalchi, A.,&北京8701信箱.(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.
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