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Numerical Simulation of the Aerosol Formation and Spreading in a Train Cabin

Konstantynov, Mykhailo and Schmeling, Daniel and Wagner, Claus (2022) Numerical Simulation of the Aerosol Formation and Spreading in a Train Cabin. [Other]

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Official URL: https://ssrn.com/abstract=4040582

Abstract

In this paper a numerical approach for the prediction of the unsteady aerosol formation and transmission process in a train cabin is presented. For that purposes models to simulate unsteady flows including the transient behaviour of two-phase atomization process and thermal air flow are employed. Results of aerosol distribution for coughing, speaking and breathing (with and without mask) in specified train cabin compartment are discussed. The dispersion of the exhaled droplets was analysed for a double cough, 10 s talking and continuous breathing of one source passenger. The results obtained show that the dispersion of aerosol particles in the cabin after coughing is two times deeper than when speaking, 2.5 times deeper than when free breathing and 17 times deeper than when breathing with a mask. Further, the results revealed that 2 minutes after the end of the coughing, only about 6% of active aerosol particles remain in the compartment and relatively clean air is again in the cabin.

Item URL in elib:https://elib.dlr.de/185600/
Document Type:Other
Additional Information:The manuscript was submitted to the Journal of Aerosol Science. This is a pre-print version.
Title:Numerical Simulation of the Aerosol Formation and Spreading in a Train Cabin
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Konstantynov, MykhailoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmeling, DanielUNSPECIFIEDhttps://orcid.org/0000-0003-2712-9974UNSPECIFIED
Wagner, ClausUNSPECIFIEDhttps://orcid.org/0000-0003-2273-0568UNSPECIFIED
Date:22 February 2022
Journal or Publication Title:SSRN
Open Access:Yes
DOI:10.2139/ssrn.4040582
Page Range:pp. 1-42
Status:Published
Keywords:Aerosol dispersion, train compartment, computational fluid dynamics (CFD), thermal comfort model (TCM), cabin air flow, Lagrangian Multiphase Model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Schmeling, Dr Daniel
Deposited On:09 Mar 2022 12:39
Last Modified:29 Mar 2023 00:01

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