重力作用下尘粒运动的数值解法

A Numerical Solving Process for Particle Motion under Gravity Action

提出了重力作用下尘粒运动的数值解法。依据尘粒的重力、浮力及所受到的阻力推出了尘粒自然沉降时的运动方程。当尘粒的运动在斯托克斯领域内时采用理论公式求解其运动轨迹，当尘粒的运动进入非斯托克斯领域内时。

A numerical solving process for the particle motion under gravity action is proposed. Depending on the gravitation,buoyancy and resistance exerted on the particle,the velocity component of the particle in gravity direction is provided.The value of the resistance coefficient is in accord with the Stokes region.When the Reynolds number exceeds the Stokes region,an approximate method for obtaining the resistance coefficient is used to revise the Stokes region.