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Large-scale 3D flow investigations around a cyclically breathing thermal manikin in a 12 m³ room using HFSB and STB

Schröder, Andreas and Schanz, Daniel and Bosbach, Johannes and Novara, Matteo and Geisler, Reinhard and Agocs, Janos and Kohl, Andreas (2021) Large-scale 3D flow investigations around a cyclically breathing thermal manikin in a 12 m³ room using HFSB and STB. In: Proceedings of 14th International Symposium on Particle Image Velocimetry, 1 (1), pp. 1-10. ILLINOIS Tech / Paul V. Galvin Library. 14th International Symposium on Partilce Image Velocimetry 2021, 2021-08-01 - 2021-08-04, Chicago, USA (online). doi: 10.18409/ispiv.v1i1.204.

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Official URL: https://doi.org/10.18409/ispiv.v1i1.204

Abstract

Exhalation of small aerosol droplets and their transport, dispersion and (local) accumulation in closed rooms have been identified as the main pathway for indirect or airborne respiratory virus transmission from person to person, e.g. for SARS-CoV 2 or measles (Morawska and Cao 2020). Understanding airborne transport mechanisms of viruses via small bio-aerosol particles inside closed populated rooms is an important key factor for optimizing various mitigation strategies (Morawska et al. 2020), which can play an important role for damping the infection dynamics of any future and the ongoing present pandemic scenario, which unfortunately, is still threatening due to the spreading of several SARS-CoV2 variants of concern, e.g. delta (Kupferschmidt and Wadman 2021). Therefore, a large-scale 3D Lagrangian Particle Tracking experiment using up to 3 million long lived and nearly neutrally buoyant helium-filled soap bubbles (HFSB) with a mean diameter of ~ 370 µm as passive tracers in a 12 m³ generic test room has been performed, which allows to fully resolve the Lagrangian transport properties and flow field inside the whole room around a cyclically breathing thermal manikin (Lange et al. 2012) with and without mouth-nose-masks and shields applied. Six high-resolution CMOS streaming cameras, a large array of powerful pulsed LEDs have been used and the Shake-The-Box (STB) (Schanz et al. 2016) Lagrangian particle tracking algorithm has been applied in this experimental study of internal flows in order to gain insight into the complex transient and turbulent aerosol particle transport and dispersion processes around seated breathing persons.

Item URL in elib:https://elib.dlr.de/144254/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://doi.org/10.18409/ispiv.v1i1, https://www.iit.edu/ispiv2021, Paper 184
Title:Large-scale 3D flow investigations around a cyclically breathing thermal manikin in a 12 m³ room using HFSB and STB
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schröder, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-6971-9262UNSPECIFIED
Schanz, DanielUNSPECIFIEDhttps://orcid.org/0000-0003-1400-4224UNSPECIFIED
Bosbach, JohannesUNSPECIFIEDhttps://orcid.org/0000-0002-1531-127XUNSPECIFIED
Novara, MatteoUNSPECIFIEDhttps://orcid.org/0000-0002-8975-0419UNSPECIFIED
Geisler, ReinhardUNSPECIFIEDhttps://orcid.org/0009-0006-8838-3713UNSPECIFIED
Agocs, JanosUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kohl, AndreasUNSPECIFIEDhttps://orcid.org/0000-0001-8351-7256UNSPECIFIED
Date:August 2021
Journal or Publication Title:Proceedings of 14th International Symposium on Particle Image Velocimetry
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:1
DOI:10.18409/ispiv.v1i1.204
Page Range:pp. 1-10
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
Christensen, Kenneth T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Publisher:ILLINOIS Tech / Paul V. Galvin Library
Series Name:Conference Proceedings
Status:Published
Keywords:COVID-19, exhalation, thermal manikin, Lagrangian Particle Tracking, FlowFit, Large-scale STB, HFSB
Event Title:14th International Symposium on Partilce Image Velocimetry 2021
Event Location:Chicago, USA (online)
Event Type:international Conference
Event Start Date:1 August 2021
Event End Date:4 August 2021
Organizer:Illinois Institute of Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Micknaus, Ilka
Deposited On:07 Jan 2022 16:15
Last Modified:24 Apr 2024 20:43

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