Experimental and Numerical Investigation of Effect of Air Stability on Exhaled Air Dispersion

Chunwen Xu, Guangcai Gong, Peter Vilhelm Nielsen, Li Liu, Rasmus Lund Jensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

As more and more investigations have reported the influence of thermal stratification indoors on contaminant dispersion, this paper focuses on investigating this phenomenon from the perspective of air stability which is defined in accordance with atmospheric stability. One breathing thermal manikin was used for experimental study, and a numerical person was built to simulate the manikin. The velocity, temperature and concentration of tracer gas in exhaled air are affected by air stability to different degrees. The similarity of this effect among these parameters can also be observed through numerical studies. As the thermal stratification under displacement ventilation blocks the vertical movement of exhaled air, the exhaled contaminant may be trapped between temperature stratifications. As the dispersion of contaminant is closely related to the health of human indoors, the temperature structure in rooms which affects the dispersion of exhaled flow should be of concern.
Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Sustainable, Design, Engineering and Construction (ICSDEC 2014)
Number of pages6
Publication date2014
Publication statusPublished - 2014
EventThe 3rd International Conference on Sustainable, Design, Engineering and Construction - Hunan, China
Duration: 19 Sep 201421 Sep 2014
Conference number: 3

Conference

ConferenceThe 3rd International Conference on Sustainable, Design, Engineering and Construction
Number3
CountryChina
CityHunan
Period19/09/201421/09/2014

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Xu, C., Gong, G., Nielsen, P. V., Liu, L., & Jensen, R. L. (2014). Experimental and Numerical Investigation of Effect of Air Stability on Exhaled Air Dispersion. In Proceedings of the 3rd International Conference on Sustainable, Design, Engineering and Construction (ICSDEC 2014)