Evolution of particle size distribution in air in the rainfall process via the moment method | Zendy

Fu-jun Gan | Zendy; Jianzhong Lin | Zendy

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Evolution of particle size distribution in air in the rainfall process via the moment method

Author(s) -

Fu-jun Gan,

Jianzhong Lin

Publication year - 2012

Publication title -

thermal science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.339

H-Index - 43

eISSN - 2334-7163

pISSN - 0354-9836

DOI - 10.2298/tsci1205372g

Subject(s) - particle size distribution , moment (physics) , particle (ecology) , particle size , polynomial , distribution function , geometric standard deviation , physics , mechanics , distribution (mathematics) , statistical physics , classical mechanics , aerosol , meteorology , mathematics , mathematical analysis , thermodynamics , geology , paleontology , oceanography

Population balance equation is converted to three moment equations to describe the dynamical behavior of particle size distribution in air in the rainfall. The scavenging coefficient is expressed as a polynomial function of the particle diameter, the raindrop diameter and the raindrop velocity. The evolutions of particle size distribution are simulated numerically and the effects of the raindrop size distribution on particle size distribution are studied. The results show that the raindrops with smaller geometric mean diameter and geometric standard deviation of size remove particles much more efficiently. The particles which fall in the “greenfield gap” are the most difficult to be scavenged from the air

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