TY - JOUR
T1 - A detailed numerical study on the evolution of droplet size distribution of dibutyl phthalate in a laminar flow diffusion chamber
AU - Jia, Feng
AU - Li, Zi Yi
AU - Pui, David Y.H.
AU - Tsai, Chuen-Jinn
N1 - Publisher Copyright:
© 2020, The Korean Institute of Chemical Engineers.
PY - 2020/3
Y1 - 2020/3
N2 - 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 self-consistent 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.
AB - 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 self-consistent 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.
KW - Coagulation
KW - Dibutyl Phthalate
KW - Homogeneous Nucleation
KW - Laminar Flow Diffusion Chamber
KW - OpenFOAM®
KW - Vapor and Droplet Deposition
UR - http://www.scopus.com/inward/record.url?scp=85081001750&partnerID=8YFLogxK
U2 - 10.1007/s11814-019-0456-y
DO - 10.1007/s11814-019-0456-y
M3 - Article
AN - SCOPUS:85081001750
SN - 0256-1115
VL - 37
SP - 423
EP - 433
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 3
ER -