Open-source modelling of aerosol dynamics and computational fluid dynamics: bipolar and unipolar diffusion charging and photoelectric charging

Mino Woo, Mario Anton Schriefl, Markus Knoll, Adam Boies, Marc E.J. Stettler, Simone Hochgreb, Robert Takeo Nishida*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Electric charging is one of the essential aerosol dynamic mechanisms and is
harnessed for detection, capture and control of ultrafine aerosol particles in a range of devices. For simplicity, charging and transport mechanisms are commonly modelled with zero spatial dimensions (0-D) and averaged properties such as mean charge or mean particle diameter. These models often neglect localised effects of the flow distribution, diffusion, discrete charge
states, and particle polydispersity, often proving inadequate to explain experimental data. This work aims to provide an open-source three-dimensional (3-D) aerosol charging and transport model including bipolar and unipolar diffusion charging, and photoelectric charging algorithms for use in detailed design and analyses of aerosol systems. The computational model consists
of more than 200 particle transport equations for discrete charge states and polydisperse sizes coupled with ion conservation equations in the framework of OpenFOAM, an open-source computational fluid dynamics platform. Three test cases are introduced to verify implementation of three charging models by comparison with published literature: bipolar and unipolar diffusion charging, and photoelectric charging. Tutorial cases, which model three distinct aerosol sensors, are described and demonstrate the capabilities of the 3-D aerosol charging and transport models within the predetermined flow field. The openAerosolCharging code is available at https://openaerosol.sourceforge.io for widespread use and can be further modified under the GNU general public licence.
Original languageEnglish
Article number108399
JournalComputer Physics Communications
Volume278
DOIs
Publication statusPublished - Sep 2022

Keywords

  • Aerosol Dynamics
  • Open-Source Computer Code
  • Particle Electric Charging
  • Computational Fluid Dynamics
  • Aerosol dynamics
  • Computational fluid dynamics
  • Open-source computer code
  • Particle electric charging

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Hardware and Architecture

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