Abstract

The effect of neighboring fibres on the electric field of an electrically enhanced fibrous filter is considered. The electric field around a cylinder, to represent a fiber, surrounded by six other cylinders of equal radius is analyzed using the method of images. It was found that taking account of the neighboring fiber effects on the electrostatic field (ENFE) reduces the cell deposition coefficient and hence the efficiency of the filter. Therefore, the investigations without ENFE overestimate the efficiency of electrostatic fibrous filters. Furthermore, it would appear that the neighboring fiber effect is more important to situations where electrophoresis dominates. However, it is also shown that neighboring fiber effect is less important to the electric field than it is to the flow field.

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