Magnetohydrodynamics equilibria with toroidal and poloidal flowa)
Magnetohydrodynamics equilibria with toroidal and poloidal flowa)
复制标题
环形流和极向流的磁流体动力学平衡a)
DOI：
10.1063/1.1869502
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发表时间：
2005
影响因子：
2.2
通讯作者：
R. Betti
中科院分区：
文献类型：
--
作者：
L. Guazzotto;R. Betti
在目前的工作中，研究了流动对托卡马克平衡的影响，特别关注极向流动的影响。结果表明，对于相对较低的极向速度值，可以获得具有基座结构的折扣跨音速平衡。与极向阿尔文速度量级的极向流的平衡显示出产生倒沙夫拉诺夫位移。由于旋转受到新古典极向粘度的阻尼，因此还导出了大旋转平衡的准全向解，以最小化流动阻尼。在该解决方案中，磁场被解释为极向磁通量 Ψ 的函数，直至通过适当选择流动剖面进行小的修正。所有数值结果均通过代码 FLOW [L. Guazzotto、R. Betti、J. Manickam 和 S. Kaye，物理学家。等离子 11, 604 (2004)]。
In the present work, the effects of flow on tokamak equilibria are investigated, focusing in particular on the effects of poloidal flows. It is shown that discountinuous transonic equilibria with a pedestal structure can be obtained for relatively low values of the poloidal velocity. Equilibria with poloidal flow of the order of the poloidal Alfven speed are shown to develop inverted Shafranov shift. Since the rotation is damped by the neoclassical poloidal viscosity, a quasi-omnigenous solution for equilibria with large rotation is also derived in order to minimize the flow damping. In this solution, the magnetic field is construed to be a function of the poloidal magnetic flux Ψ up to a small correction by an appropriate choice of the flow profiles. All numerical results are obtained with the code FLOW [L. Guazzotto, R. Betti, J. Manickam, and S. Kaye, Phys. Plasmas 11, 604 (2004)].