Turbulent deposition of aerosol nanoparticles on a wire screen

Abstract

This paper presents experimental results of aerosol penetration through a wire screen for mobilityequivalent particle diameters between 2 and 10 nm, Reynolds numbers for the 2uid approaching the screen (Ret) between 300 and 6000, Peclet numbers (Pe) between 20 and 13 000, and wire diameters between 40 and 100 m. An empirical expression, D =(2:53 + 5:14 × 10−4 Ret)Pe(−0:65+2:58×10−5Ret), correlating the single 8ber e9ciency, D, with the Peclet and Reynolds numbers has been obtained. In the limit of very low Reynolds number (Stokes regime) the above expression reduces to D0 =2:53Pe−0:65, which is in good agreement with the widely accepted correlation for fan model 8lters, D0 =2:7Pe−2=3, of Cheng and Yeh.