Removal of aerosol through fibrous filter as a function of particle size and velocity

Filtration efficiency tests were conducted on a fiberglass mat filter with DOP areosol having a diameter from 0.1*mm to 0.45*mm in the face velocity range of 1cm/sec to 10cm/sec. Filteration of submicron particles by a fibrous filter is characterized by a face velocity. The size of DOP aerosol which has a minimum removal efficiency decreases with increasing the velocity. A numerical solution of the diffusion equation is obtained for a fiberglass mat filter by using 'Kuwabara's cell model' for the flow field and Von Mises Transformaion for the actural flow around a fiberglass. The present theoretical results agree quite well with the experimentals for the fiberglass mat. This result could be contributed to pridict the removal efficiency on the air fiter and to optimize the operating condition of an air purification system with a filter. (Author)