Collision efficiency of two nanoparticles with different diameters in Brownian coagulation  

作　　者：王玉明 林建忠 

机构地区：[1]Institute of Fluid Measurement and Simulation China Jiliang University [2]State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2011年第8期1019-1028,共10页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.10632070)

摘　　要：The collision efficiency of two nanoparticles with different diameters in the Brownian coagulation is investigated. The collision equations are solved to obtain the collision efficiency for the dioctyl phthalate nanoparticle with the diameter changing from 100 nm to 750 nm in the presence of the van der Waals force and the elastic deformation force. It is found that the collision efficiency decreases as a whole with the increase of both the particle diameter and the radius ratio of two particles. There exists an abrupt increase in the collision efficiency when the particle diameter is equal to 550 nm. Finally, a new expression is presented for the collision efficiency of two nanoparticles with different diameters.The collision efficiency of two nanoparticles with different diameters in the Brownian coagulation is investigated. The collision equations are solved to obtain the collision efficiency for the dioctyl phthalate nanoparticle with the diameter changing from 100 nm to 750 nm in the presence of the van der Waals force and the elastic deformation force. It is found that the collision efficiency decreases as a whole with the increase of both the particle diameter and the radius ratio of two particles. There exists an abrupt increase in the collision efficiency when the particle diameter is equal to 550 nm. Finally, a new expression is presented for the collision efficiency of two nanoparticles with different diameters.

关 键 词：NANOPARTICLE Brownian coagulation collision efficiency different diameters van der Waals force elastic force 

分 类 号：O343[理学—固体力学]