Vapor condensation on nanoparticles in the mixer of a particle size magnifier
Vapor condensation on nanoparticles in the mixer of a particle size magnifier
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2006.10.046
复制
发表时间：
2007-06
影响因子：
5.2
通讯作者：
S. Fisenko;Wei-Ning Wang;M. Shimada;K. Okuyama
中科院分区：
文献类型：
--
作者：
S. Fisenko;Wei-Ning Wang;M. Shimada;K. Okuyama
考虑了过饱和混合气体中纳米颗粒表面的蒸汽凝结。在大气压下，通过在圆柱形混合器中混合具有不同温度的两种流来产生过饱和。选择混合条件，使得蒸汽的均匀成核不会掩盖内部具有纳米颗粒的异质液滴的生长。在一维描述混合器的基础上，建立了非均匀液滴生长的数学模型。确定了影响颗粒尺寸放大器性能的五个参数：饱和器的温度和纳米颗粒的流量，纳米颗粒的数密度和初始半径，以及流速比。模拟结果与我们的实验数据进行了比较。
The vapor condensation on nanoparticles in a supersaturated gaseous mixture is considered. Supersaturation was created by mixing two flows with different temperatures in a cylindrical mixer at atmospheric pressure. The conditions for mixing were chosen such that the homogeneous nucleation of vapor did not mask the growth of heterogeneous droplets with nanoparticles inside. A mathematical model of the growth of heterogeneous droplets was developed at one-dimensional description of the mixer. Five parameters that affect the performance of the particles size magnifier were identified: temperature of the saturator and the flow with nanoparticles, the number density and initial radius of the nanoparticles, and ratio of flow rates. The results of the simulation are compared with our experimental data.