Investigation of the effect of material's cell size with the fixed porosity on the efficiency of aerosol particle deposition

Abstract

© Published under licence by IOP Publishing Ltd. In this work, numerical simulation of the motion of dusty gas in the open cell foam material (filter's model) is carried out. The geometry of the porous material is created by a set of intersecting spheres arranged randomly in the space. Simulation of the gas flow in a porous medium without the use of averaged models is of great interest to scientists, and it is a detailed numerical simulation that takes into account the features of the internal structure. The studies were carried out for three characteristic pore sizes of 4, 5 and 6 mm of the filter cell to determine the size that is most preferable for the creation and use of porous filters operating at a given flow rate. Calculations have shown that a filter with the cell size of 4 mm has the highest quality factor, whereas a change in the deposition efficiency and the filter quality parameter for a casing with pore sizes of 5 mm and 6 mm differ insignificantly and much less than the parameters of the first case. The calculations performed are in good agreement with the semiempirical dependence of other authors.