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Binary homogeneous nucleation and growth of water-sulfuric acid nanoparticles using a TEMOM model. (English) Zbl 1187.82103
Summary: Binary homogeneous nucleation and growth process of water-sulfuric acid nanoparticles in atmospheric environment is studied using a new developed moment model (i.e., TEMOM model). The underlying mechanisms due to Brownian motion are employed in the general dynamic equation which is further closed by Taylor-expansion technique. The newly proposed model provides high precision and efficiency in studying the present binary nucleation system as compared to exiting models. The competition between nucleation, coagulation and condensation in the whole nucleation and subsequent growth processes is systemically investigated in both cases with background particles and without particles. The results show the nucleation kinetics and aerosol dynamics are strongly dependent of production rate of sulfuric acid, and also dependent of the competition ability to scavenge sulfuric acid between pre-existing particles and nucleated particles.

82C40 Kinetic theory of gases in time-dependent statistical mechanics
60J65 Brownian motion
82D80 Statistical mechanics of nanostructures and nanoparticles
86A10 Meteorology and atmospheric physics
Full Text: DOI
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