Gyro‐Landau fluid models for toroidal geometry
Gyro‐Landau fluid models for toroidal geometry
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环形几何的陀螺朗道流体模型
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
G. Hammett
中科院分区：
文献类型：
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作者：
R. Waltz;R. Dominguez;G. Hammett
陀螺-朗道流体模型方程为陀螺动力学方程的有限阶矩提供了一阶时间推进，同时近似地保留了陀螺半径平均和朗道阻尼的影响。本文推广了Hammett和Perkins[Phys.莱特牧师。对于平行于磁场的静电运动和E×B运动，考虑了回转平均运动和曲率漂移运动。通过比较模型方程的离子-温度-梯度模线性增长率和精确的回转动力学理论在全参数范围内的增长率，对方程进行了检验。
Gyro‐Landau fluid model equations provide first‐order time advancement for a limited number of moments of the gyrokinetic equation, while approximately preserving the effects of the gyroradius averaging and Landau damping. This paper extends the work of Hammett and Perkins [Phys. Rev. Lett. 64, 3019 (1990)] for electrostatic motion parallel to the magnetic field and E×B motion to include the gyroaveraging linearly and the curvature drift motion. The equations are tested by comparing the ion‐temperature‐gradient mode linear growth rates for the model equations with those of the exact gyrokinetic theory over a full range of parameters.