Turbulent deposition of aerosol nanoparticles on a wire screen

This paper presents experimental results of aerosol penetration through a w ire screen for mobility-equivalent particle diameters between 2 and 10 nm, Reynolds numbers for the fluid approaching the screen (Re-t) between 300 an d 6000, Peclet numbers (Pe) between 20 and 13 000, and wire diameters betwe en 40 and 100 mum. An empirical expression, eta (D) = (2.53 + 5.14 x 10(-4) Re-t)Pe((-0.65 + 2.5 8 x 10 -5Ret)), correlating the single fiber efficien cy, eta (D), With the Peclet and Reynolds numbers has been obtained. In the limit of very low Reynolds number (Stokes regime) the above expression red uces to eta (D0) = 2.53Pe(-0.65) which is in good agreement with the widely accepted correlation for fan model filters, eta (D0) = 2.7Pe(-2/3), of Che ng and Yeh. (C) 2001 Elsevier Science Ltd. All rights reserved.