The Relationship Between Fiber Length and the Penetration Rate of Fibrous Aerosol Tthrouih Wire Mesh Screens

A New Method for Measuring Median Fiber Length

Abstract

Wire mesh screens were used as a length classifier of fibrous aerosol. The penetration rates of fibrous aerosol were simulated by means of the Monte Carlo method. The penetration rates depend only on the interception parameter, that is, the ratio of fiber length to the wire distance of each screen. Experimental results of penetration rates of glass fiber aerosol showed good agreement with the simulated results.
Length distributions of outlet fibrous aerosol through the wire mesh screens were also calculated using the penetration rate and length distributions of inlet fibrous aerosol. Longer fibers were eliminated by the wire mesh screens, and the geometric standard deviation of length distribution decreased after passing through the screen.
Finally, a new method for measuring the median fiber length was presented. If lognormal distribution is assumed for fiber length and the total penetration rates of the fibrous aerosol are measured for a few kinds of wire mesh screens, one can graphically obtain the median fiber length of fibrous aerosol using Fig. 5.