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Comparison of Geometrical Layouts for a Multi-Box Aerosol Model from a Single-Chamber Dispersion Study

The National Research Centre for the Working Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark
Aerosol Physics, Laboratory of Physics, Faculty of Natural Sciences, Tampere University of Technology, Korkeakoulunkatu 10, FI-33720 Tampere, Finland
Institut National de Recherche et de Sécurité (INRS), Rue du Morvan CS 60027, 54519 Vandoeuvre CEDEX, France
Bundesanstalt für Arbeitsschutz und Arbeitsmedizin, Nöldnerstr. 40-42, 10317 Berlin, Germany
Centre for Occupational and Environmental Health, The University of Manchester, Oxford Rd., Manchester M13 9PL, UK
Institute of Occupational Medicine, Research Ave N, Currie EH14 4AP, UK
TNO, Lange Kleiweg 137, 2288 GJ Rijswijk, The Netherlands
Instituto Tecnológico del Embalaje Transporte y LOGÍSTICA, C/Albert Einstein, 1, 46980 Paterna, Spain
Department of Civil Engineering, Technical University of Denmark, Anker Engelunds Vej 1 Bygning 101A, 2800 Kongens Lyngby, Denmark
Force Technology, Park Allé 345, 2605 Brøndbyvester, Denmark
Author to whom correspondence should be addressed.
Environments 2018, 5(5), 52;
Received: 19 February 2018 / Revised: 16 April 2018 / Accepted: 22 April 2018 / Published: 24 April 2018
PDF [2529 KB, uploaded 3 May 2018]


Models are increasingly used to estimate and pre-emptively calculate the occupational exposure of airborne released particulate matter. Typical two-box models assume instant and fully mixed air volumes, which can potentially cause issues in cases with fast processes, slow air mixing, and/or large volumes. In this study, we present an aerosol dispersion model and validate it by comparing the modelled concentrations with concentrations measured during chamber experiments. We investigated whether a better estimation of concentrations was possible by using different geometrical layouts rather than a typical two-box layout. A one-box, two-box, and two three-box layouts were used. The one box model was found to underestimate the concentrations close to the source, while overestimating the concentrations in the far field. The two-box model layout performed well based on comparisons from the chamber study in systems with a steady source concentration for both slow and fast mixing. The three-box layout was found to better estimate the concentrations and the timing of the peaks for fluctuating concentrations than the one-box or two-box layouts under relatively slow mixing conditions. This finding suggests that industry-relevant scaled volumes should be tested in practice to gain more knowledge about when to use the two-box or the three-box layout schemes for multi-box models. View Full-Text
Keywords: aerosol modelling; dispersion factor; geometry; chamber study; multiple boxes; occupational exposure aerosol modelling; dispersion factor; geometry; chamber study; multiple boxes; occupational exposure

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Jensen, A.C.Ø.; Dal Maso, M.; Koivisto, A.J.; Belut, E.; Meyer-Plath, A.; Van Tongeren, M.; Sánchez Jiménez, A.; Tuinman, I.; Domat, M.; Toftum, J.; Koponen, I.K. Comparison of Geometrical Layouts for a Multi-Box Aerosol Model from a Single-Chamber Dispersion Study. Environments 2018, 5, 52.

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