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Weak and Strong MHD Turbulence

被引：0
|
作者：
Gogoberidze, G. [1 ,2 ]
Mahajan, S. [3 ]
Poedts, S. [1 ]
Akhalkatsi, M. [2 ]
机构：
[1] Katholieke Univ Leuven, Ctr Plasma Astrophys, Celestijnenlaan 200B, B-3001 Louvain, Belgium
[2] Ilia State Univ, Inst Theoret Phys, Tbilisi 0162, Georgia
[3] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA
来源：
3RD SCHOOL AND WORKSHOP ON SPACE PLASMA PHYSICS | 2011年 / 1356卷
关键词：
magnetohydrodynamic turbulence; turbulence modeling; INTERSTELLAR TURBULENCE; SIMULATIONS; ANISOTROPY;
D O I：
10.1063/1.3598094
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 general conditions for the weak and strong regimes of incompressible magnetohydrodynamic turbulence are derived and studied in the framework of the direct interaction approximation. It is shown that in the framework of the weak turbulence theory, the autocorrelation and cascade timescales are always of the same order of magnitude. This means that, contrary to the general belief, any model of turbulence which implies a large number of collisions among wave packets for an efficient energy cascade (such as the Iroshnikov-Kraichnan model), does not represent a model of weak turbulence.
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页数：8
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