Abstract
This paper applies what is already known about the aspiration efficiency of blunt aerosol samplers at large angles to the interesting case of sampling under “orientation-averaged” conditions. This is particularly relevant to practical aerosol sampling in workplaces and the atmospheric environment. The resultant semiempirical model of aspiration efficiency contains a number of coefficients which are fitted by nonlinear regression to data sets for the human head and for two rotating-head inhalable aerosol samplers (a 3 L/min sampler intended for applications in workplaces and a 70 L/min sampler intended for particle sampling in the ambient atmosphere). Agreement for all three data sets (with 88, 64, and 37 records respectively) is generally good, with an overall R 2corr of 68%. Such semiempirical models can be useful for predicting and interpreting sampler performance until practical versions of more rigorous mathematical and numerical models become available.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 271-286 |
| Number of pages | 16 |
| Journal | Aerosol Science and Technology |
| Volume | 22 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 1995 |
Bibliographical note
Funding Information:The work described in this paper is part of a body of work supported by the Nickel Producers Environmental Research Association (NiPERA) as part of a program of research on aerosol exposure assessment. That support is gratefully acknowledged. In addition, one of the authors (PJT) carried out this work while attending the University of Minnesota on a scholarship from the Government of the Republic of China (Taiwan), and is grateful for this support.