On the efficiency with which aerosol particles of radius larger than 0.1 μm are collected by simple ice crystal plates

J. J. Martin, P. K. Wang, H. R. Pruppacher, A. E. Hamielec

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

A theoretical model is presented which allows computing the efficiency with which aerosol particles of radius 0.1≤r≤10 μm are collected by simple ice crystal plates of radius 50≤ac≤640 μm in air of various relative humidities, temperatures and pressures. Particle capture due to thermophoresis, diffusiophoresis and inertial impaction are considered. It is shown that the capture efficiency of an ice crystal in considerably affected by phoretic effects in the range 0.1≤r≤1 μm. For aerosol particles of r>1 μm the efficiency is strongly controlled by the flow field around the crystal and the density of the aerosol material. Trajectory analysis also predicts that aerosol particles are preferentially captured by the ice crystal rim. Our theoretica results are found to agree satisfactorily with the laboratory studies presently available. Comparison shows that for the same pressure, temperature and relative humidity of the ambient air ice crystal plates are better aerosol particle scavengers than water drops.

原文English
頁(從 - 到)1109-1129
頁數21
期刊Pure and Applied Geophysics
118
發行號2
DOIs
出版狀態Published - 1980 9月

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球化學與岩石學

指紋

深入研究「On the efficiency with which aerosol particles of radius larger than 0.1 μm are collected by simple ice crystal plates」主題。共同形成了獨特的指紋。

引用此