亚微米颗粒在谢尔宾斯基海绵模型中的热泳沉积研究

ue to the special size of sub-micron particles, there are a lot differences from the traditional fine particles with the physical properties and chemical properties. The particles can easily be inhaled human body, and causing great harm to the body. Sierpinski sponge model as an idealized structural model, with the characteristics of large specific surface area, multi-channel, etc. Through establishment of Sierpinski sponge model channel which can be applied in the project, and combined with the mathematical model of thermophoretic deposition, it can be found that as the order of the Sierpinski sponge increased, the main factors of sub-micron particle thermophoretic deposition rate is the ascension of internal channels. Compared with other size of the particles, moving in the sponge-channel sub-micron particles are more susceptible to thermophoretic deposition effects. Temperature difference has a great impact on the thermophoretic deposition, and the effect manifests the characteristics of linear change. The establishment of Sierpinski sponge model channel with engineering features can open up a new way to study of sub-micron particle deposition and desorption.