화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.37, No.3, 423-433, March, 2020
DOI10.1007/s11814-019-0456-y  Export Citation
A detailed numerical study on the evolution of droplet size distribution of dibutyl phthalate in a laminar flow diffusion chamber
Feng Jia1, Zi-Yi Li2, David Y. H. Pui3, 4, and Chuen-Jinn Tsai1, †
  • 1Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
  • 2School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 3Mechanical Engineering Department, University of Minnesota, Minneapolis, MN 55455, USA
  • 4School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
E-mail:
A numerical model was used to study the homogeneous nucleation process of dibutyl phthalate (DBP) vapor in a laminar flow diffusion chamber (LFDC); the spatial and temporal evolution of DBP droplet size distribution was governed by the population balance equation (PBE). In the PBE, the nucleation rate was calculated by the selfconsistent correction nucleation theory (SCCNT), droplet coagulation, vapor and droplet deposition losses were considered. The simulation results showed that the nucleation rate predicted by the SCCNT improved the underestimation of that predicted by the classical nucleation theory. Due to vapor deposition before nucleation and droplet deposition after nucleation on the wall, the DBP mass loss was severe, accounting for about 86.3% of the total inlet vapor mass, and the droplet size distribution shifted towards larger diameters. The simulation results agreed well with the experimental data in terms of the droplet size distribution and average number concentration at the outlet of the LFDC because of the detailed droplet dynamic, transport and deposition mechanisms treated in this model. Based on this model, the number of molecules in the critical cluster was calculated using the first nucleation theorem and found to be larger about 50% than that calculated using the Gibbs-Thompson equation.
Keywords:Homogeneous Nucleation;Dibutyl Phthalate;Laminar Flow Diffusion Chamber;Coagulation;Vapor and Droplet Deposition;OpenFOAM
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