Abstract: The optimization of the fiber filter media’s internal structural parameters is crucial to improving the filtering performance. A series of three-dimensional structure of the fiber filter media, where cylindrical fibers are random arrangement, staggered arrangement and alignment arrangement,was created with computer technology. And the gas flow fields with different SVF, different face velocity and different fibrous arrangement are presented. Three dimensionless pressure drop expressions corresponding to the three kinds of fiber filter media were obtained. There have a good agreement between the CFD simulations and the Davies’s equation. The results indicate: the pressure drop increases linearly with the face velocity; but it increases non-linear with the SVF; The pressure drop of these three types of fiber arrangement by size is staggered arrangement, alignment arrangement and random arrangement respectively.

Key words: fiber filter, numerical simulation, gas flow field, pressure drop