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

Alexander C. O. Jensen, Miikka Dal Maso, Antti J. Koivisto, Emmanuel Belut, Asmus Meyer-Plath, Martie Van Tongeren, Araceli Sanchez Jimenez, Ilse Tuinman, Maida Domat, Jorn Toftum, Ismo K. Koponen

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number52
Number of pages16
JournalEnvironments
Volume5
Issue number5
DOIs
Publication statusPublished - May 2018
Publication typeA1 Journal article-refereed

Keywords

  • aerosol modelling
  • dispersion factor
  • geometry
  • chamber study
  • multiple boxes
  • occupational exposure
  • VOLATILE ORGANIC-COMPOUNDS
  • AIRBORNE PARTICLES
  • WORKER EXPOSURE
  • INDOOR
  • DEPOSITION
  • NANOMATERIALS
  • VENTILATION
  • EMISSIONS
  • RISK
  • FLOW

Publication forum classification

  • Publication forum level 1

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