Dispersion behaviors of exhaled droplets under a displacement ventilated room: Lagrangian simulations

Gao Naiping, He Qibin, Jianlei Niu, Zhu Tong, Wu Jiazheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper adopts an Eulerian-Lagrangian approach to investigate the dispersion behaviors of human exhaled droplets under the displacement ventilation in a typical office room. A particle source in-cell (PSI-C) scheme is used to correlate the concentration with the Lagrangian particle trajectories in computational cells. Droplets with size from 0.1-20μm are released from a numerical thermal manikin's (NTM) nose or mouth with different initial momentums and directions. The possible cross-infection risk caused by the exhaled infectious droplets is investigated. It is found that droplets exhaled from the NTM's nose could be caught by its thermal plume whereas droplets exhaled from the NTM's mouth could penetrate the thermal plume. Droplet sizes affect their dispersion behaviors. The cross-infection risk is small and doesn't depend a lot on the ventilation conditions in this study.
Original languageEnglish
Title of host publicationProceedings of Building Simulation 2011: 12th Conference of International Building Performance Simulation Association
Pages207-214
Number of pages8
Publication statusPublished - 1 Dec 2011
Event12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011 - Sydney, NSW, Australia
Duration: 14 Nov 201116 Nov 2011

Conference

Conference12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011
CountryAustralia
CitySydney, NSW
Period14/11/1116/11/11

ASJC Scopus subject areas

  • Computer Science Applications
  • Building and Construction
  • Architecture
  • Modelling and Simulation

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