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Zheng M, Fan Y, Li X, Lester D, Chen X, Li Y, Cole I. Aerosol exchange between pressure-equilibrium rooms induced by door motion and human movement. BUILDING AND ENVIRONMENT 2023; 241:110486. [PMID: 37287526 PMCID: PMC10232724 DOI: 10.1016/j.buildenv.2023.110486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/11/2023] [Accepted: 05/30/2023] [Indexed: 06/09/2023]
Abstract
It is now widely recognised that aerosol transport is major vector for transmission of diseases such as COVID-19, and quantification of aerosol transport in the built environment is critical to risk analysis and management. Understanding the effects of door motion and human movement on the dispersion of virus-laden aerosols under pressure-equilibrium conditions is of great significance to the evaluation of infection risks and development of mitigation strategies. This study uses novel numerical simulation techniques to quantify the impact of these motions upon aerosol transport and provides valuable insights into the wake dynamics of swinging doors and human movement. The results show that the wake flow of an opening swinging door delays aerosol escape, while that of a person walking out entrains aerosol out of the room. Aerosol escape caused by door motion mainly happens during the closing sequence which pushes the aerosols out. Parametric studies show that while an increased door swinging speed or human movement speed can enhance air exchange across the doorway, the cumulative aerosol exchange across the doorway is not clearly affected by the speeds.
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Affiliation(s)
- Minfeng Zheng
- Fujian Eco-materials Engineering Research Center, Fujian University of Technology, Fuzhou, 350118, PR China
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Yaming Fan
- Fujian Eco-materials Engineering Research Center, Fujian University of Technology, Fuzhou, 350118, PR China
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Xiangdong Li
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Daniel Lester
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Xin Chen
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, PR China
| | - Yiyu Li
- Fujian Eco-materials Engineering Research Center, Fujian University of Technology, Fuzhou, 350118, PR China
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, 350118, PR China
| | - Ivan Cole
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
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