SOL-divertor plasma simulations introducing anisotropic temperature with virtual divertor model
SOL-divertor plasma simulations introducing anisotropic temperature with virtual divertor model
复制标题
SOL-偏滤器等离子体模拟通过虚拟偏滤器模型引入各向异性温度
DOI：
10.1016/j.jnucmat.2014.09.081
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Y. Ogawa
中科院分区：
文献类型：
--
作者：
S. Togo;T. Takizuka;M. Nakamura;K. Hoshino;Y. Ogawa
在虚偏滤器模型下引入各向异性离子温度，编制了一个一维溶胶偏滤器等离子体模拟程序。通过直接引入各向异性离子温度，可以将动量输运方程中的二阶导数平行离子粘性项排除在外，并且在模拟中不需要偏滤器板处的边界条件。为了隐式地表达偏滤器板和伴随鞘层的影响，引入了一个具有人工粒子、动量和能量汇的虚拟偏滤器模型。利用虚偏滤器模型，可得到周期性边界条件。利用该模型，成功地获得了满足玻姆条件的溶胶偏滤器等离子体。研究了离子温度各向异性对离子归一化平均自由程的依赖关系，以及平行离子粘滞通量对Braginskii表达式和有限粘滞通量的有效性。
A 1D SOL–divertor plasma simulation code by introducing the anisotropic ion temperature with virtual divertor model has been developed. By introducing the anisotropic ion temperature directly, the second-order derivative parallel ion viscosity term in the momentum transport equation can be excluded and the boundary condition at the divertor plate will not be required in the simulation. In order to express the effects of the divertor plate and accompanying sheath implicitly, a virtual divertor model which has artificial sinks for the particle, momentum and energy has been introduced. Periodic boundary condition becomes available by the use of the virtual divertor model. By using this model, SOL–divertor plasmas which satisfy the Bohm condition has been successfully obtained. The dependence of the ion temperature anisotropy on the normalized mean free path of ion and the validity of the parallel ion viscous flux for the Braginskii expression and the limited one are also investigated.