According to the pseudo-homogeneous fluid performance of aerosol particles

a mass transfer analogy model was proposed for PM2.5 collection on the interface of gas-liquid cross flow. With the mechanism analysis on the particle transport behavior analogized to fluid convective heat transfer

which is mainly affected by the Schmidt number (Sc) and its exponent m

an analogous equation of Sherwood number (Sh) of particle transfer was derived for PM2.5 collection through a staggered falling film array (SFFA)

based on a widely used equation of Nusselt number (Nu) of convective heat transfer over the staggered tube bundles. From the analogous equation of Sh

a model for prediction of PM2.5 collection efficiency was deduced with the exponent m as the model parameter. The value of m was obtained to be 0.808 via regression analysis of experimental data of PM2.5 collection efficiencies measured in a SFFA consisting of 20 (line)×90 (row) falling film cylinders with diameter of 3 mm. In the range of Reynolds number from 50 to 650

the deviation between the model prediction of PM2.5 mass transfer Sh and the experimental data is within ±20%.