Reflection and absorption of ion‐acoustic waves in a density gradient
作者:
Osamu Ishihara,
Igor Alexeff,
H. J. Doucet,
W. D. Jones,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1978)
卷期:
Volume 21,
issue 12
页码: 2211-2217
ISSN:0031-9171
年代: 1978
DOI:10.1063/1.862158
出版商: AIP
数据来源: AIP
摘要:
One problem with ion‐acoustic waves is that sometimes they are observed to be reflected from discharge tube walls, and sometimes to be absorbed. Theoretical computation reveals that a velocity gradient produced by a density gradient plays a significant role in the reflection. The velocity gradient produces a subsonic−supersonic transition and long wavelength waves are reflected before reaching the transition while short wavelength waves penetrate over the transition and are absorbed in the supersonic flow plasma.
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