Deposition of aerosol particles on rough surfaces inside a test chamber

Enhancement effect of relative humidity on the formation and regional respiratory deposition of secondary organic aerosol

“…However, the deposition loss-rate coefficient estimated by this model, which focuses on the turbulent (eddy) and Brownian diffusion, is a particle-size-dependent coefficient, while the apparent loss rate of the total number concentration observed in this study did not change with the growth of particle size in the particle size region scanned (10-310 nm). Therefore, other transport mechanisms such as turbophoresis and the surface roughness may also play an important role in the deposition of SOA [1,38]. The deposition loss-rate coefficient estimated by Zhao and Wu's model [37] with a friction velocity of 4.8 cm/s and mean surface roughness height of 1 (dimensionless unit) is close to the overall deposition loss-rate coefficients observed in this study (1.00 ± 0.02 h −1 ).…”

Numerical evaluation of louver configuration and ventilation strategies for the windcatcher system

“…Particle deposition on surfaces depends much on the surface roughness and materials. In the typical office, particle deposition shows different rates on walls, furniture and other surfaces [43]. This study simply adopts a uniform roughness height of 0.001 m. The geometry of the model room is shown in Fig.…”

Measuring the Short-Term Emission Rates of Particles in the “Personal Cloud” with Different Clothes and Activity Intensities in a Sealed Chamber

“…Particle deposition has been studied experimentally in controlled chambers or real buildings (Offermann et al, 1985;Xu et al, 1994;Byrne et al, 1995;Fogh et al, 1997;Normura et al, 1997;Lai et al, 2002;Thatcher et al, 2002;Chao et al, 2003;Wallace et al, 2004;Bouilly et al, 2005;He et al, 2005;Hussein et al, 2005b;Lai and Nazaroff, 2005;Chen et al, 2006;Hussein et al, 2006;Hamdani et al, 2008;Hussein et al, 2009;Chen et al, 2012b). Due to the perfect air tightness of the chamber, the outdoor particle penetration and indoor particle removal by air exchange can be neglected.…”