Performance and efficiency of aerosols fixation by a granular bed in the presence of acoustic wave

All the important aerosol separation mechanisms and their efficiencies in the case of a granular bed have been studied, as well as flow and pressure drop. These mechanisms are treated theoretically both in the absence and in the presence of an acoustic wave, in order to assess the possibility of improving the efficiency in the presence of the latter. The method of combinations of individual efficiencies corresponding to different mechanisms, by the application of probability theories, and their variation as a function of the system parameters are also given and the overall efficiency calculated. Some important effects on aerosols, of acoustic waves as a function of their intensity and frequency are then reviewed, as well as their attenuation in a granular bed and the influence, on the efficiency of this device, of the direction of propagation versus that of the fluid flow. The granular bed can filter an important volume of air in a very short time. This is interesting in some fields such as nuclear power plants; in the case of radioactive aerosol leaks, the exposure and inhalation time are reduce by this important flow rate filtration