Abstract
Particle intake by human breathing is important for developing relevant estimates of exposure in the indoor environments; however, relatively few studies are devoted to the influence from human activities. This study evaluates the nasal inhalability of micron particles for a manikin in motion by transient computational fluid dynamics (CFD) simulations. The model was built using a full-scale manikin with key facial features at the nose and mouth. The manikin was moving at a speed of 0.8 m/s through stagnant air in an indoor environment achieved by dynamic mesh. Three nasal inhalation rates of 15, 27, and 40 LPM (litres per minute) and four particle sizes (7, 22, 52, and 82 μm) were considered. The particle intake fraction was calculated to quantify the nasal inhalability of particles over different conditions. Fluid flow field of the motion-induced wake flow and particle trajectories were visualized to reveal the principles of the particle inhalability for a body in motion. This study quantifying the particle intake for a moving manikin will help to characterize a more holistic scenario for respiration modellings and developing estimates of exposure affected by human activities.
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05 February 2022
A Correction to this paper has been published: https://doi.org/10.1007/s42757-022-0132-z
References
Aitken, R. J., Baldwin, P. E. J., Beaumont, G. C., Kenny, L. C., Maynard, A. D. 1999. Aerosol inhalability in low air movement environments. J Aerosol Sci, 30:613–626.
Anderson, K. R., Anthony, T. R. 2014. Computational fluid dynamics investigation of human aspiration in low velocity air: Orientation effects on nose-breathing simulations. Ann Occup Hyg, 58: 625–645
Anthony, T. R., Flynn, M. R. 2006. Computational fluid dynamics investigation of particle inhalability. J Aerosol Sci, 37: 750–765.
Belyaev, S. P., Levin, L. M. 1972. Investigation of aerosol aspiration by photographing particle tracks under flash illumination. J Aerosol Sci, 3: 127–140.
Bird, A. J. 2005. Use of numerical calculations to simulate the sampling efficiency performance of a personal aerosol sampler. Aerosol Sci Tech, 39: 596–610.
Breysse, P. N., Swift, D. L. 1990. Inhalability of large particles into the human nasal passage: in vivo studies in still air. Aerosol Sci Tech, 13:459–464.
Chen, Q. 1995. Comparison of different k-e models for indoor air flow computations. Numer Heat Tr B-Fund, 28: 353–369.
Chen, Q. Y., Chao, N.-T. 1997. Comparing turbulence models for buoyant plume and displacement ventilation simulation. Indoor Built Environ, 6: 140–149.
Hyun, S., Kleinstreuer, C. 2001. Numerical simulation of mixed convection heat and mass transfer in a human inhalation test chamber. Int JHeat Mass Transfer, 44: 2247–2260.
Inthavong, K., Tian, Z. F., Tu, J. Y. 2009. Effect of ventilation design on removal of particles in woodturning workstations. Build Environ, 44: 125–136.
Kennedy, N. J., Hinds, W. C. 2002. Inhalability of large solid particles. JAerosol Sci, 33:237–255.
Klepeis, N. E., Nelson, W. C., Ott, W. R., Robinson, J. P., Tsang, A. M., Switzer, P., Behar, J. V., Hern, S. C, Engelmann, W. H. 2001. The national human activity pattern survey (NHAPS): A resource for assessing exposure to environmental pollutants. J Expo Anal Env Epid, 11:231–252.
Lai, A. C. K. 2002. Particle deposition indoors: A review. Indoor Air, 12:211–214.
Licina, D., Tian, Y. L., Nazaroff, W. W. 2017. Inhalation intake fraction of particulate matter from localized indoor emissions. Build Environ, 123: 14–22.
Nazaroff, W. W. 2008. Inhalation intake fraction of pollutants from episodic indoor emissions. Build Environ, 43: 269–277.
Ramos, C. A., Reis, J. F., Almeida, T., Alves, F., Wolterbeek, H. T., Almeida, S. M. 2015. Estimating the inhaled dose of pollutants during indoor physical activity. Sci Total Environ, 527–528: 111–118.
Se, C. M. K., Inthavong, K., Tu, J. Y. 2010. Inhalability of micron particles through the nose and mouth. Inhal Toxicol, 22: 287–300.
Shi, S. S., Li, Y., Zhao, B. 2014. Deposition velocity of fine and ultrafine particles onto manikin surfaces in indoor environment of different facial air speeds. Build Environ, 81: 388–395.
Sleeth, D. K., Vincent, J. H. 2009. Inhalability for aerosols at ultra-low windspeeds. J Phys: Conf Ser, 151: 012062.
Speziale, C. G., Thangam, S. 1992. Analysis of an RNG based turbulence model for separated flows. Int J Eng Sci, 30: 1379–1388.
Tao, Y., Inthavong, K., Tu, J. Y. 2017. A numerical investigation of wind environment around a walking human body. J Wind Eng Ind Aerod, 168:9–19.
Thatcher, T. L., Lai, A. C. K., Moreno-Jackson, R., Sextro, R. G., Nazaroff, W. W. 2002. Effects of room furnishings and air speed on particle deposition rates indoors. Atmos Environ, 36: 1811–1819.
Yakhot, V., Orszag, S. A. 1986. Renormalization-group analysis of turbulence. Phys Rev Lett, 57: 1722–1724.
Yakhot, V., Orszag, S. A., Thangam, S., Gatski, T. B., Speziale, C. G. 1992. Development of turbulence models for shear flows by a double expansion technique. Phys Fluids A-Fluid, 4: 1510–1520.
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Tao, Y., Yang, W., Ito, K. et al. Computational fluid dynamics investigation of particle intake for nasal breathing by a moving body. Exp. Comput. Multiph. Flow 1, 212–218 (2019). https://doi.org/10.1007/s42757-019-0014-1
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DOI: https://doi.org/10.1007/s42757-019-0014-1