Impact of higher-order flows in the moment equations on Pfirsch-Schluter friction coefficients

Honda M.

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Impact of higher-order flows in the moment equations on Pfirsch-Schluter friction coefficients

机译：矩方程中高阶流对Pfirsch-Schluter摩擦系数的影响

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The impact of the higher-order flows in the moment approach on an estimate of the friction coefficients is numerically examined. The higher-order flows are described by the lower-order hydrodynamic flows using the collisional plasma assumption. Their effects have not been consistently taken into account thus far in the widely used neoclassical transport codes based on the moment equations in terms of the Pfirsch-Schluter flux. Due to numerically solving the friction-flow matrix without using the small-mass ratio expansion, it is clearly revealed that incorporating the higher-order flow effects is of importance especially for plasmas including multiple hydrogenic ions and other lighter species with similar masses. (C) 2014 AIP Publishing LLC.

机译：数值检验了矩量法中高阶流对摩擦系数估计值的影响。使用碰撞等离子体假设，通过低阶水动力流描述高阶流。到目前为止，在基于Pfirsch-Schluter通量的矩方程的广泛使用的新古典运输代码中，尚未始终考虑到它们的影响。由于在不使用小质量比膨胀的情况下，通过数值方法求解了摩擦流动矩阵，因此清楚地表明，尤其对于包含多个氢离子和质量相似的其他轻质物质的等离子体，纳入高阶流动效应至关重要。（C）2014 AIP Publishing LLC。

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《Physics of plasmas》 |2014年第9期|共10页
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Honda M.;
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Impact of higher-order flows in the moment equations on Pfirsch-Schluter friction coefficients

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