Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35933
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Title: Drag constants for common indoor bioaerosols
Authors: Wong, LT 
Yu, HC
Mui, KW 
Chan, WY
Issue Date: 1-May-2015
Source: Indoor and built environment, 1 May 2015, v. 24, no. 3, p. 401-413
Abstract: In practice, the drag coefficient of a particle is usually calculated using empirical relationships obtained by generalizing experimental data. This study demonstrates that using the default Stokes' law settings in FLUENT to computationally predict the drag coefficients for bioaerosol deposition is not really appropriate: the average fractional bias is 7% and the average normalized mean square error is 15%. Comparatively, the errors for bacteria (-12% to 24%) are larger than those for fungi (-8% to 26%). These errors, however, can be minimized by selecting a suitable drag constant, which can be determined based on the bioaerosol diameter. The average drag constants for bacteria were shown by the results to vary from 0.25 to 3.1, which are much smaller than the default value of 24, whereas the values for fungi were generally larger and in a wider range. This study also investigated the correlation between the drag coefficient and Reynolds number for common indoor bioaerosols with diameters between 0.69 and 8.6 mu m. The outcome of this study would therefore provide a good reference point for future estimation of the deposition distribution patterns of various common indoor bioaerosols.
Keywords: Bioaerosol
Deposition
Drag coefficient
Drag constant
Publisher: SAGE Publications
Journal: Indoor and built environment 
ISSN: 1420-326X
EISSN: 1423-0070
DOI: 10.1177/1420326X13515897
Rights: This is the accepted version of the publication Wong, L. T., Yu, H. C., Mui, K. W., & Chan, W. Y., Drag constants for common indoor bioaerosols, Indoor and Built Environment (Volume 24 and issue 3) pp. 401-413. Copyright © 2013 (The Author(s)). DOI: 10.1177/1420326X13515897.
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