Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 1.558
IF1.558
IF 5-year value: 1.475
IF 5-year
1.475
CiteScore value: 2.8
CiteScore
2.8
SNIP value: 0.921
SNIP0.921
IPP value: 1.56
IPP1.56
SJR value: 0.571
SJR0.571
Scimago H <br class='widget-line-break'>index value: 55
Scimago H
index
55
h5-index value: 22
h5-index22
Volume 14, issue 5
Nonlin. Processes Geophys., 14, 575–586, 2007
https://doi.org/10.5194/npg-14-575-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: Nonlinear waves and turbulence in space

Nonlin. Processes Geophys., 14, 575–586, 2007
https://doi.org/10.5194/npg-14-575-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  04 Sep 2007

04 Sep 2007

Numerical simulations of the charging of dust particles by contact with hot plasmas

W. J. Miloch1, H. L. Pécseli2, and J. Trulsen1 W. J. Miloch et al.
  • 1University of Oslo, Institute of Theoretical Astrophysics, P.O. Box 1029 Blindern, 0315 Oslo, Norway
  • 2University of Oslo, Institute of Physics, P.O. Box 1048 Blindern, 0316 Oslo, Norway

Abstract. Charging of individual dust particles in contact with hot plasmas is studied by numerical methods. The dust particle is treated as a rigid solid body, composed by either perfectly insulating or conducting material. The collisionless plasma, consisting of electrons and singly charged ions, is simulated by Particle-in-Cell methods in two spatial dimensions. It is demonstrated that the surface conditions, i.e. roughness, of the dust particles are significant for the charging. In a streaming plasma, a dust grain develops an electric dipole moment which varies systematically with the relative plasma flow. The strength and direction of this dipole moment depends critically on the material. We observe also Langmuir oscillations excited in the vicinity of the particles, and analyze the spatial variation of their spectral distribution.

Publications Copernicus
Download
Citation