In order to separate PM2.5 from air efficiently, PM2.5 separating by the surface of falling liquid cylinders from the aerosol contaminated fluid was studied experimentally and numerically.Titanium dioxide whose particle size was 0.3 μm was used as the experimental particles.An Euler-Lagrange model was employed to describe the gas-liquid cross flow and the trap of particles.The influencing factors of purifying process, such as thermophoresis force caused by temperature difference between gas and liquid, gas and liquid flow rate were investigated.The results showed that when liquid temperature kept 20 ℃, the PM2.5trap efficiencies were 6.8%~20% in a four-row liquid columns array with a temperature difference of 0~30 ℃ in the experiments.The experimental data showed a similar trend with the numerical simulation results.
