Fully self-consistent ion-drag force calculations for dust in collisional plasmas with external electric field

Details Fully self-consistent ion-drag force calculations for dust in collisional plasmas with external electric field Fully self-consistent ion-drag force calculations for dust in collisional plasmas with external electric field

2008-04-09

arxiv.org/abs/0804.1556v2

Physics

Plasma Physics

4 Pages, 4 Figures Submitted to PRL

Scientific paper

10.1103/PhysRevLett.101.025001

The ion-drag force on a spherical dust particle immersed in a flowing plasma with external electric field is self-consistently calculated using the Particle In Cell code SCEPTIC in the entire range of charge-exchange collisionality. Our results, not based on questionable approximations, extend prior analytic calculations valid only in a few limiting regimes. Particular attention is given to the force direction, shown never to be directed opposite to the flow except in the continuum limit, where other forces are of much stronger magnitude.

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