Large scale motions in electrical discharges
作者:
Mahinder S. Uberoi,
Chuen‐Yen Chow,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1977)
卷期:
Volume 20,
issue 11
页码: 1815-1820
ISSN:0031-9171
年代: 1977
DOI:10.1063/1.861798
出版商: AIP
数据来源: AIP
摘要:
Mass motions of a plasma are numerically analyzed for a discharge from a central small screen electrode of circular cross section and two other screen electrodes covering the two ends of a circular tube. In effect, there are two oppositely directed discharges from the central electrode and this simplifies the analysis. Rotational electromagnetic forces cause two large eddies, each with a region of high velocity or a jet on either side of the central electrode. The case is further computed where the plasma is allowed to flow from one end to the other through the tube and the screen electrodes. The plasma entering the end screen electrode flows around the eddy lying between the electrode and the central electrode. This provides a recirculating and confined motion associated with the first discharge. As the plasma flows farther downstream, it is drawn to the axis of the second discharge and becomes a part of its jet.
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