Coupling of aerosol removal mechanisms in rising bubbles

During many postulated severe accidents, especially boiling water reactor accidents, gas-borne aerosols are vented through water pools. This process causes some of the aerosols to be removed by transfer from the gases to the water. This scrubbing effect generally can be divided into two major zones - the entrance region and the bubble rise region. This paper is concerned with aerosol removal in the bubble rise region only. This analysis of aerosol removal in a rising bubble considers four mechanisms. These mechanisms include three removal mechanisms consisting of sedimentation, inertial deposition, and Brownian diffusion. The fourth mechanism is the evaporation of water at the expanding bubble wall, which tends to retard aerosol removal. In addition, the shape of the bubble will affect the aerosol removal rate. This paper examines three ways of combining the various deposition mechanisms with the retarding effect of the evaporation as well as two methods to correct for the bubble shape