PZT溶胶液静电雾化雾场模拟

Simulation of the aerosol of electrostatic spray of PZT sol solution

通过对商用计算流体力学软件FLUENT进行功能扩展,实现了空气流场、空间电场和离散雾场多场耦合过程的数值模拟.由实验数据确定雾滴的滴径和电量,采用拉格朗日模型计算雾滴在重力、空气阻力、外部电场力及雾滴间相互库伦排斥力作用下的运动轨迹,并得到雾滴的速度与其空间分布密度,由此计算雾滴在衬底上的沉积通量.

The commercial computational fluid dynamics （CFD） code FLUENT was extended to simulate the aerosol deposition process in an electrospraying system. With the droplets＇ diameter and charge distribution defined by experiments, the trajectory of each droplet was calculated by Lagrange＇s Model, taking into account gravity force, air drag force, external electric force and coulombic force. The droplets＇ velocities and spatial distribution density were obtained and their mass flux on substrate was calculated to estimate the film deposition rate.