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arXiv 0901.3406physics.plasm-phastro-ph.EPastro-ph.GAphysics.flu-dynphysics.geo-phphysics.space-ph
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球形等离子体发电机实验

A Spherical Plasma Dynamo Experiment

E. J. Spence, K. Reuter, C. B. Forest

摘要:

我们提出了一个等离子体实验,用于研究天体物理发电机的基本性质。高传导性、快速流动的等离子体将使实验者能够探索磁雷诺数比液态金属实验大一个数量级的系统。等离子体被限制使用一个环尖策略,并受到一个环形差动旋转外边界条件。作为原则的证明,我们提出了磁流体动力学模拟所提出的实验。当一个冯卡门型边界条件被指定,和磁雷诺数是足够大的,发电机行动观察。在不同值的磁普朗特数和雷诺数的模拟演示层流或湍流发电机的行动。

英文摘要:

We propose a plasma experiment to be used to investigate fundamental properties of astrophysical dynamos. The highly conducting, fast-flowing plasma will allow experimenters to explore systems with magnetic Reynolds numbers an order of magnitude larger than those accessible with liquid-metal experiments. The plasma is confined using a ring-cusp strategy and subject to a toroidal differentially rotating outer boundary condition. As proof of principle, we present magnetohydrodynamic simulations of the proposed experiment. When a von Kármán-type boundary condition is specified, and the magnetic Reynolds number is large enough, dynamo action is observed. At different values of the magnetic Prandtl and Reynolds numbers the simulations demonstrate either laminar or turbulent dynamo action.

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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