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随机场区的磁力线分布几率可从刘维方程得到,用它可以求任何与磁场有关的物理量的平均。发展了一种计算磁扰动对反常输运的贡献的方法,在一定条件下,动量方程可化为郎之万方程,流体元可看成做布郎运动的巨分子,从而可用统计学方法得到迁移几率和扩散系数。结果指出,磁扰动引起的反常扩散大于同样条件下的经典扩散,远小于玻姆扩散。在超高温下(T>8keV),磁扰动对反常输运的贡献很小。托卡马克的几何因子R,α也对反常输运有影响。
The magnetic field distribution probability of the random field can be obtained from the Liu-Wei equation, and can be used to find the average of any magnetic field-related physical quantities. A method of calculating the contribution of magnetic perturbations to anomalous transport has been developed. Under certain conditions, the momentum equation can be converted into a Langhammer equation. The fluid element can be considered as a giant molecule for a Brownian motion and can be statistically obtained Migration probability and diffusion coefficient. The results indicate that the anomalous diffusion caused by magnetic disturbance is larger than the classical diffusion under the same condition, which is much smaller than that of bum. At very high temperatures (T> 8 keV), the contribution of magnetic perturbations to abnormal transport is small. The tokamak geometric factors R, α also have an effect on the abnormal transport.