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arXiv 1402.0750astro-ph.HEphysics.plasm-ph
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实验室和天体物理等离子体中螺旋度通量驱动的α效应

Helicity-Flux-Driven Alpha Effect in Laboratory and Astrophysical Plasmas

F. Ebrahimi, A. Bhattacharjee

摘要:

磁螺旋度守恒对α效应的约束被认为是磁和流动为主的自组织等离子体。直接数值模拟的主要贡献的α效应,它可以被铸造的平均螺旋度通量,称为螺旋度通量驱动的α(H $α$)效果的总发散的函数形式。本文对H $α$效应进行了直接数值模拟,并给出了两个例子:对撕裂模不稳定的磁主导环形等离子体和流动主导的吸积盘。

英文摘要:

The constraint imposed by magnetic helicity conservation on the alpha effect is considered for both magnetically and flow dominated self-organizing plasmas. Direct numerical simulations are presented for a dominant contribution to the alpha effect, which can be cast in the functional form of a total divergence of an averaged helicity flux, called the helicity-flux-driven alpha ( H$α$) effect. Direct numerical simulations of the H$α$ effect are prese nted for two examples---the magnetically dominated toroidal plasma unstable to tearing modes, and the flow-dominated accretion disk.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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