New correlations for the initial collection efficiency of Brownian aerosol particles with the bounce-off effect considered in granular filtration

The bounce-off effect on the initial collection efficiency of Brownian aerosols in fibrous filtration.

“…A large number of simulations must be performed, so that reasonable predictions of particle deposition efficiency may be achieved due to the stochastic nature of the process. In this work, we found that 𝑁 𝑔𝑒𝑛 = 500 and 𝜂 0 averaged from ten trials yield adequate results in the present simulation 4,14,24 .…”

“…The center of the cylindrical fibrous collector was chosen as the origin in the Cartesian coordinate (Figure 1) in the present simulation procedure, as adopted by Chang et al 4,12,13,14 and Ramarao et al 24 . By using a random number generator, each incoming aerosol at the inlet control window (of a cylindrical collector) is assigned the initial position (𝑟 𝑖𝑛 , 𝜃 𝑖𝑛 ).…”

“…One feasible strategy for removing these fine particles is to use porous filter. In our previous work, collection efficiency of aerosol particles by granular filters has been analyzed 4 . Our focus in this work is on the fibrous filter because of its small fiber diameter and high porosity 5 .…”