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arXiv 1502.05494physics.plasm-ph
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磁化等离子体丝中的惯性泡孔对称性破缺

Inertial blob-hole symmetry breaking in magnetised plasma filaments

Alexander Kendl

摘要:

磁化等离子体细丝的传播速度之间的对称性打破大的积极(斑点)和消极(孔)的振幅,所暗示的尺寸分析缩放,研究与全球(“全N”)非Boussinesq陀螺流体计算,其中包括有限的惯性效应,通过非线性极化。平坦密度背景上的交换斑点具有更高的惯性,并且比空穴传播得更慢。在存在足够大的密度梯度的情况下,效果是相反的:斑点沿着梯度加速,而空穴沿着梯度传播的速度减慢。漂移波斑点传播他们的初始涡迅速发展成一个充分发展的湍流状态,而初级孔可以保持相干许多涡流周转时间。结果承担等离子体边缘带状流演化和托卡马克刮脱层输运的影响。

英文摘要:

Symmetry breaking between the propagation velocities of magnetised plasma filaments with large positive (blob) and negative (hole) amplitudes, as implied by a dimensional analysis scaling, is studied with global ("full-n") non-Boussinesq gyrofluid computations, which include finite inertia effects through nonlinear polarisation. Interchange blobs on a flat density background have higher inertia and propagate more slowly than holes. In the presence of a large enough density gradient, the effect is reversed: blobs accelerate down the gradient and holes are slowed in their propagation up the gradient. Drift wave blobs spread their initial vorticity rapidly into a fully developed turbulent state, whereas primary holes can remain coherent for many eddy turnover times. The results bear implications for plasma edge zonal flow evolution and tokamak scrape-off-layer transport.

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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