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arXiv 0906.1095astro-ph.SRastro-ph.GA
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可重联磁绳发电机

A Reconnecting Flux Rope Dynamo

Andrew W. Baggaley, Carlo F. Barenghi, Anvar Shukurov, Kandaswamy Subramanian

摘要:

我们发展了一个新的模型的波动发电机中的磁场被限制在薄磁通绳平流的多尺度流动模拟湍流。磁耗散仅通过磁通绳的重新连接而发生。我们调查的动能释放成热,介导的发电机行动,无论是在我们的模型,并通过求解感应方程相同的流量。我们发现磁绳发电机在将机械能转化为热能方面要高出一个数量级。磁场重联中磁能释放的概率密度呈幂律形式,斜率为-3,与纳米耀斑对日冕的加热一致。

英文摘要:

We develop a new model of the fluctuation dynamo in which the magnetic field is confined in thin flux ropes advected by a multi-scale flow modeling turbulence. Magnetic dissipation occurs only via reconnection of the flux ropes. We investigate the kinetic energy release into heat, mediated by the dynamo action, both in our model and by solving the induction equation with the same flow. We find that a flux rope dynamo is an order of magnitude more efficient at converting mechanical energy into heat. The probability density of the magnetic energy release in reconnections has a power-law form with the slope -3, consistent with the Solar corona heating by nanoflares.

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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