Influence of fiber size distribution on the permeability of fibrous filters

N. Bardin-Monnier*, A. Charvet, D. Thomas, Lorraine University, France

Predicting the pressure drop in fibrous filters and as a consequence the permeability is of crucial importance to many applications in air treatment. Many studies have been led on this topic, but they almost always deal with single sized fibers. However fibrous filters consist of blend of coarse fibers ensuring the mechanical rigidity and fine ones responsible for the high filtration efficiency. Simulations of flows for perfectly characterized geometries seem to be the most efficient tool to investigate this problem.

The aim of the work is to use simulation as a tool to a thorough study of the parameters influencing the permeability values in case of air filtration operations. The numerical study is performed with the GeoDict® code (Math2Market, GmbH). The mean fiber diameter ranges from 1 to 5 micrometers, the variation coefficient (ratio standard deviation over mean diameter) from 20 to 40 % and the packing density from 1 % to 25 %. Calculations were carried out for different media configurations fixing each of these variable. The approach is based on...

Session: F10 - Numerical Analysis of Filter Media Pore Size and Structure
Day: 24 October 2019
Time: 10:45 - 12:00 h

Learn more at FILTECH 2019 - Register Now!