Repositori institucional URV
Español Català English
TÍTOL:
Effects of upper respiratory tract anatomy and head movement on the buoyant flow and particle dispersion generated in a violent expiratory event - imarina:9280529

Autor/s de la URV:Cito, Salvatore / Fabregat Tomàs, Alexandre / Pallarés Curto, Jorge María
Autor segons l'article:Pallares J; Fabregat A; Cito S
Adreça de correu electrònic de l'autor:salvatore.cito@urv.cat
alexandre.fabregat@urv.cat
jordi.pallares@urv.cat
Identificador de l'autor:0000-0001-7626-3374
0000-0002-6032-2605
0000-0003-0305-2714
Any de publicació de la revista:2022
Tipus de publicació:Journal Publications
Referència de l'ítem segons les normes APA:Pallares J; Fabregat A; Cito S (2022). Effects of upper respiratory tract anatomy and head movement on the buoyant flow and particle dispersion generated in a violent expiratory event. Journal Of Aerosol Science, 166(), 106052-. DOI: 10.1016/j.jaerosci.2022.106052
Referència a l'article segons font original:Journal Of Aerosol Science. 166 106052-
Resum:In the wake of the COVID-19 pandemic, interest in understanding the turbulent dispersion of airborne pathogen-laden particles has significantly increased. The ability of infectious particles to stay afloat and disperse in indoor environments depends on their size, the environmental conditions and the hydrodynamics of the flow generated by the exhalation. In this work we analyze the impact of three different aspects, namely, the buoyancy force, the upper airways geometry and the head rotation during the exhalation on the short-term dispersion. Large-Eddy Simulations have been used to assess the impact of each separate effect on the thermal puff and particle cloud evolution over the first 2 s after the onset of the exhalation. Results obtained during this short-term period suggest that due to the rapid mixing of the turbulent puff, buoyancy forces play a moderate role on the ability of the particles to disperse. Because of the enhanced mixing, buoyancy reduces the range and increases the vertical size of the small particle clouds. In comparison to the fixed frame case, head rotation has been found to notably affect the size and shape of the cloud by enhancing the vertical transport as the exhalation axial direction sweeps vertically during the exhalation. The impact of the upper airway geometry, in comparison to an idealized mouth consisting in a pipe of circular section, has been found to be the largest when it is considered along with the head rotation.
DOI de l'article:10.1016/j.jaerosci.2022.106052
Enllaç font original:https://www.sciencedirect.com/science/article/pii/S0021850222000908
Versió de l'article dipositat:info:eu-repo/semantics/publishedVersion
Accès a la llicència d'ús:https://creativecommons.org/licenses/by/3.0/es/
Departament:Enginyeria Mecànica
URL Document de llicència:https://repositori.urv.cat/ca/proteccio-de-dades/
Àrees temàtiques:Química
Pollution
Meteorology & atmospheric sciences
Mechanical engineering
Materials science (miscellaneous)
General materials science
Fluid flow and transfer processes
Environmental sciences
Environmental engineering
Environmental chemistry
Engineering, mechanical
Engineering, chemical
Atmospheric science
Paraules clau:Unsteady jet
Turbulent puff
Turbulent dispersion
Transport
Particle dispersion
Large-eddy simulation
Expiratory event
unsteady jet
turbulent puff
turbulent dispersion
particle dispersion
large-eddy simulation
aerosols
Entitat:Universitat Rovira i Virgili
Data d'alta del registre:2024-09-07
Cerca el teu registre a:

Fitxers disponibles
FitxerDescripcióFormat
DocumentPrincipalDocumentPrincipalapplication/pdf

Informació

© 2011 Universitat Rovira i Virgili