Comptes Rendus
no. 10
Mécanismes physiques du nuage d'orage et de l'éclair/The physics of thundercloud and lightning discharge
A new model of charge transfer during ice–ice collisions
[Un nouveau modèle décrivant le transfert de charge lors d'une collision entre particules de glace]
Marcia Baker1 ; Jon Nelson2
1 Depts of Earth and Space Science and Atmospheric Sciences, University of Washington, Seattle, WA 98195-1310, USA
2 Nelson Scientific, 7-13-8 Oginosato Higashi Otsu, Shiga 520-0248, Japan
Comptes Rendus. Physique, Volume 3 (2002) no. 10, pp. 1293-1303.
est référencé par Comment on “A new model of charge transfer during ice–ice collisions” [C. R. Physique 3 (2002) 1293–1303]
[Commentaire sur « Un nouveau modèle décrivant le transfert de charge lors d'une collision entre particules de glace »]

Nous présentons un model décrivant l'échange de charge électrique entre deux particules de glace qui entrent en collision et se séparent. Nous calculons la distribution de charge près de la surface d'une particule de glace, soit en état d'équilibre, soit pendant la croissance ou sublimation. Sur la base de considérations géométriques simples mais plausibles, nous calculons la masse d'eau fondue sous l'effet de la pression au point de contact, et nous supposons que le transfert de charge électrique associé s'effectue à partir de la particule à plus faible rayon de courbure. Les predictions du modèle sont globalement en accord avec les observations de plusieurs laboratoires.

We present a new model of charge transfer between two particles of ice that collide and then rebound. We calculate the charge distribution near the surface of an ice particle both in equilibrium and during growth or sublimation. Using simplified but plausible geometrical descriptions of the colliding surfaces we calculate the mass that is melted by the excess pressure at the point of contact, and we assume that electric charge is transferred from the sharper to the flatter particle with the melted material. Our predictions are in semiquantitative agreement with charge transfer measurements from several laboratories.

Publié le :
DOI : 10.1016/S1631-0705(02)01408-1
Keywords: electrification, thunderstorms, ice surface, charge transfer
Mot clés : électrisation, orages, surface de glace, transfert de charge électrique
Marcia Baker 1 ; Jon Nelson 2

1 Depts of Earth and Space Science and Atmospheric Sciences, University of Washington, Seattle, WA 98195-1310, USA
2 Nelson Scientific, 7-13-8 Oginosato Higashi Otsu, Shiga 520-0248, Japan 
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Marcia Baker; Jon Nelson. A new model of charge transfer during ice–ice collisions. Comptes Rendus. Physique, Volume 3 (2002) no. 10, pp. 1293-1303. doi : 10.1016/S1631-0705(02)01408-1. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(02)01408-1/

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