带电粒子在空间关联的湍动静电场中扩散行为的粒子模拟

A SIMULATION OF DIFFUSION OF CHARGED PARTICLES IN A SPACE CORRELATION TURBULENT ELECTRIC FIELD

本文用Monte-Carlo方法模拟具有一维高斯型空间关联函数的湍动静电场,在此基础上通过积分带电粒子在该湍动电场中的运动方程,得到粒子系的相对扩散和绝对扩散的演化过程。所得模拟结果不但定性的与解析理论一致,而且定量符合也令人满意。

A Monte-Carlo method is used to simulate the turbulent electrostatic field with space correlation. Evolution processes of relative and absolute diffusions of charged particles in this turbulent field can be obtained by integrating equations of motion of the particles. Simulation results agree well with the analytic theories[4,5] both qualitatively and semi-quantitatively.