摘要: Using nicotine as a marker for the particulate phase of mainstream cigarette smoke, a computational fluid dynamic (CFD) model was developed to simulate the flow and retention of cigarette smoke aerosol particulate in a cellulose acetate filter tip. A volume averaging method was applied to simplify the physical model of filtration. A commercially available software package, ANSYS FLUENT, was used to simulate the distribution of smoke particulate phase (nicotine) in filter tip at different puff time points within the 2.0 s puff duration under ISO regime. At the end of smoking, the axial and radial distribution of volume fraction profiles of nicotine in the filter, as well as the filtration efficiency were obtained. To validate the effectiveness of the developed model, the simulation results were compared with experimental data. The results showed that: 1)the axial distribution of nicotine retention in cellulose acetate filter was that the concentration of nicotine decreased gradually from the tobacco column side to mouth end of the filter, which is in good agreement with the experimental data. 2)In radial direction, both experimental and simulated nicotine concentrations exhibited a reducing trend from the center to periphery of the filter. However, the simulated concentration increased near the periphery of the filter. 3) The relative deviation of the filter filtration efficiency of nicotine between the simulated and experimental results was 20.7%.