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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Scale-lengths and instabilities in magnetized classical and relativistic plasma fluid models
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Scale-lengths and instabilities in magnetized classical and relativistic plasma fluid models

机译:磁化经典和相对论等离子体流体模型中的标度长度和不稳定性

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摘要

The validity of the traditional plasma continuum is predicated on a hierarchy of scale-lengths, with the Debye length being considered to be effectively unresolvable in the continuum limit. In this article, we revisit the strong magnetic field case in which the Larmor radius is comparable or smaller than the Debye length in the classical plasma, and also for a relativistic plasma. Fresh insight into the validity of the continuum assumption in each case is offered, including a fluid limit on the Alfven speed that may impose restrictions on the validity of magnetohydrodynamics (MHD) in some solar and fusion contexts. Additional implications concerning the role of the firehose instability are also explored.
机译:传统血浆连续体的有效性取决于刻度长度的层次结构,而Debye长度被认为在连续体极限中实际上无法解析。在本文中,我们将回顾强磁场的情况,在这种情况下,拉莫尔半径可与经典等离子中的Debye长度相媲美或小于德拜长度,并且也适用于相对论性等离子体。提供了有关每种情况下连续性假设有效性的最新见解,包括对Alfven速度的流体限制,该限制可能会在某些太阳和聚变环境中对磁流体动力学(MHD)的有效性施加限制。还探讨了有关消防水带不稳定作用的其他含义。

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