高频热等离子体中液滴传热传质过程研究

The Study of Heat and Mass Transfer Mechanism of Solution Droplet in RF Plasma

建立了单个液滴在高频感应热等离子体中内部传热传质的数学模型,考虑了希尔球形涡的影响,模拟了液滴在不同入射尺寸下的内部传热传质变化过程。结果表明,随着液滴入射尺寸的增大,液滴表面溶质质量分数到达饱和状态所需时间缩短,且其内部环流的对流作用占主导因素,使得溶质在液滴表面集中,易形成浓度集中的表面薄层。

The mathematical model of internal heat and mass transfer of a single solution droplet in RF plasma is established by considering the influence of the Hill＇s spherical vortex, and the process of the internal heat and mass transfer of the droplet by different injection parameters are simulated. The results show that with the increasing of the droplet inject size, the precipitation time is shorter, and the convection of the internal circulation is enhanced, and the solute of the droplet is accumulation at the droplet surface, and make the concentration is high at the droplet surface.