Journal article
Polarized supersonic plasma flow simulation for charged bodies such as dust particles and spacecraft
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, Vol.52(5), pp.5312-5326
11/1995
DOI: 10.1103/PhysRevE.52.5312
PMID: 9964030
Abstract
When an object such as a dust particle or spacecraft is immersed in a plasma flowing at a supersonic speed, an asymmetric screening potential forms around that object. The asymmetry is especially pronounced on the downstream side, with an ion rarefaction in the wake followed by an ion focus region. This polarized screening potential helps explain recent laboratory results with dusty plasmas, where collective interparticle effects were shown to be asymmetric. Using an electrostatic fluid simulation with cold ions and Boltzmann electrons, we have simulated the flow around spherical and cylindrical bodies, with and without a negative potential bias. Here, the flow speed v0 is assumed to be supersonic (faster than ion acoustic) and mesothermal (vTiv0vTe). A numerical method is used, with a diffuse object that simulates the ion loss and space charge on an objects surface. This works with one or many objects, of any shape. We present solutions for systems of one and two particles in a simulation box, with periodic boundary conditions that help reveal collective effects
Details
- Title: Subtitle
- Polarized supersonic plasma flow simulation for charged bodies such as dust particles and spacecraft
- Creators
- F MelandsøJ Goree - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, Vol.52(5), pp.5312-5326
- DOI
- 10.1103/PhysRevE.52.5312
- PMID
- 9964030
- ISSN
- 1063-651X
- eISSN
- 1095-3787
- Language
- English
- Date published
- 11/1995
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199802102771
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