ArticlePhysics of fluids (Woodbury, N.Y. : 1994)2021
Numerical investigation of respiratory drops dynamics released during vocalization.
Article in Physics of fluids (Woodbury, N.Y. : 1994), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Understanding lifetime and dispersion of cough-emitted droplets in air.Indoor + built environment : the journal of the International Society of the Built Environment · 2023Article
- The effect of relative air humidity on the evaporation timescales of a human sneeze.AIP advances · 2022Article
- Numerical investigation of droplets in a cross-ventilated space with sitting passengers under asymptomatic virus transmission conditions.Physics of fluids (Woodbury, N.Y. : 1994) · 2021Article
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Release of drops from a human body has been the focus of many recent investigations because of the current COVID-19 pandemic. Indirect virus transmission from asymptomatic individuals has been proved to be one of the major infectious routes and difficult to quantify, detect, and mitigate. We show in this work a detailed and novel numerical investigation of drops released during vocalization from a thermal manikin using a large eddy simulation coupled with Lagrangian tracking of drops. The vocalization experiment was modeled using existing data from the literature for modeling exhaled airflow, emission rate, and size distribution. Particular focus was on the definition of the boundary conditions for the exhalation process. Turbulence was compared with experimental data for the near mouth region for 75 exhalation breathing cycles and showed the sensitivity of different modeling assumptions at the mouth inlet. The results provide insights of special interest for understanding drop dynamics in speech-like exhalation modes, modeling the mouth inlet boundary conditions, and providing data for verifying other more simplified models.
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Registered trials
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