静电喷粉沉积速度场理论研究

THE THEORY OF DEPOSITION VELOCITYIN ELECTROSTATIC DUSTING

基于颗粒的扩散特性和颗粒对流体湍流脉动响应的不同机理，以圆柱为模拟目标物，建立了静电喷粉沉积过程中荷电颗粒随机位移的概率密度分布函数所满足的Ｆｏｋｋｅｒ－Ｐｌａｎｃｋ方程。由该方程解出的分布函数表明，沉积过程中荷电颗粒的运动特性不仅决定于颗粒的荷电特性与空间电场分布以及流体的运动特性，而且与初始位置和速度有关。

Based on the different mechanisms of particle's dispersion and the response to the turbulence, a Fokker Planck equation for charged particle's motion was established to describe the deposition velocity around a cylinder in electrostatic dusting. The probability density function shows that the motion of the charged particle is depended not only on particle charging, electrostatic field and the behavior of fluid, but also on initial position and velocity.