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Droplets expelled during human expiratory activities and their origin

Morawska, Lidia, Johnson, Graham R., Ristovski, Zoran, Hargreaves, Megan, Mengersen, Kerrie L., Chao, Christopher, Wan, Man Pun, Li, Yuguo, Xie, Xaiojan, & Katoshevski, David (2008) Droplets expelled during human expiratory activities and their origin. In 11th International Conference on Indoor Air Quality and Climate, 17th August to 22nd August 2008, Copenhagen, Denmark.

Abstract

This paper presents the findings of the most comprehensive program of study to date aimed at quantifying the number, size distribution and evaporation of droplets produced during virtually any expiratory activity. This international research program included teams of investigators from a number of universities, with each group contributing to essential aspects of the research. This research revealed many previously unknown aspects of expiratory aerosol dynamics and characteristics. This paper will focus on the findings that the time taken for expiratory droplets to achieve short term equilibrium is comparable to that for pure water droplets and that the droplet size distributions have distinct features reflecting specific production mechanisms whose intensity varies with the nature of the activity.

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Full-text downloads:

441 since deposited on 31 Oct 2008
50 in the past twelve months

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ID Code: 15416
Item Type: Conference Paper
Additional URLs:
Keywords: Expiratory Aerosols, Droplet Evaporation, Mucus, Size Distribution, UVAPS
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2008 (please consult author)
Deposited On: 31 Oct 2008
Last Modified: 29 Feb 2012 23:52

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