A modified expression for the steady-state heterogeneous nucleation rate. (September 2015)

• Record Type: Journal Article
• Authors: Fan, Yu; Qin, Fenghua; Luo, Xisheng; Zhang, Jiaoshi; Wang, Jie; Gui, Huaqiao; Liu, Jianguo
• Is Part Of: Journal of aerosol science. Volume 87(2015:Sep.)
• Page Start: 17
• Page End: 27
• Publication Date: 2015-09
• Subjects: Heterogeneous nucleation -- Steady-state rate -- Line tension -- Critical supersaturation -- Particle; SHNR steady-state heterogeneous nucleation rate; Aerosols -- Periodicals; Aerosols -- Periodicals; Aérosols -- Périodiques; 541.34515
• DOI: 10.1016/j.jaerosci.2015.05.001
• Languages: English
• ISSNs: 0021-8502

Abstract

Abstract: A modified expression is derived to calculate the steady-state rate of heterogeneous nucleation on an insoluble spherical particle. For the first time, this modified expression comprehensively considers three factors used in previous expressions, i.e., two mechanisms of cluster growth, the self-consistent expression for the equilibrium number density of clusters, and the effect of line tension. The effects of the three factors are analyzed, and the comparisons of predicted and measured critical supersaturations are presented to validate the advantage of the modified expression and investigate the contributions of the three factors to heterogeneous nucleation. The results show that all the three factors especially the line tension in previous expressions should be considered, which promote the heterogeneous nucleation process. It is also found that the predicted data of the modified expression are much closer to the experimental data than those of the previous expressions. Abstract : Highlights: A modified expression for steady-state heterogeneous nucleation rate is derived. Three factors used in previous expressions are comprehensively considered. The contributions of the three factors used in previous expressions are analyzed. The comparisons of predicted and measured data are presented. The predicted data of our expression are much closer to the experimental data.