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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Agglomeration of ice and dust particles in the mesosphere are studied using classical electrostatic approaches, which are extended to capture the induced polarisation of surface charge. The instances of strong attraction between particles of the same sign of charge are predicted, which take place at small separation distances and also lead to the formation of stable aggregates.
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Preprints
https://doi.org/10.5194/acp-2020-1148
https://doi.org/10.5194/acp-2020-1148

  10 Dec 2020

10 Dec 2020

Review status: this preprint is currently under review for the journal ACP.

The influence of surface charge on the coalescence of ice and dust particles in the mesosphere

Joshua Baptiste1, Connor Williamson1, John Fox1, Anthony J. Stace1, Muhammad Hassan2, Stefanie Braun2, Benjamin Stamm2, Ingrid Mann3, and Elena Besley1 Joshua Baptiste et al.
  • 1School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK
  • 2Center for Computational Engineering Science, Mathematics Department, RWTH Aachen University, Schinkelstr. 2, 52062 Aachen, Germany
  • 3UiT The Arctic University of Norway, Space Physics Group, Postboks 6050 Langnes, 9037 Tromsø, Norway

Abstract. Agglomeration of charged ice and dust particles in the mesosphere is studied using a classical electrostatic approach, which is extended to capture the induced polarisation of surface charge. Collision outcomes are predicted whilst varying particle size, charge, dielectric constant, relative kinetic energy, collision geometry and the coefficient of restitution. In addition to attractive Coulomb forces acting on particles of opposite charge, instances of strong attraction between particles of the same sign of charge are predicted, which take place at small separation distances and also lead to the formation of stable aggregates. These attractive forces are governed by the polarisation of surface charge.

Joshua Baptiste et al.

 
Status: open (until 16 Feb 2021)
Status: open (until 16 Feb 2021)
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Joshua Baptiste et al.

Joshua Baptiste et al.

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Short summary
Agglomeration of ice and dust particles in the mesosphere are studied using classical electrostatic approaches, which are extended to capture the induced polarisation of surface charge. The instances of strong attraction between particles of the same sign of charge are predicted, which take place at small separation distances and also lead to the formation of stable aggregates.
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