On the secondary instability in plane Poiseuille flow
作者:
John Kim,
Robert D. Moser,
期刊:
Physics of Fluids A
(AIP Available online 1989)
卷期:
Volume 1,
issue 5
页码: 775-777
ISSN:0899-8213
年代: 1989
DOI:10.1063/1.857374
出版商: AIP
数据来源: AIP
摘要:
Numerical experiments were performed to clarify apparent differences between experimental observations and a theoretical prediction of the secondary instability in plane Poiseuille flow. It is shown that subharmonic breakdown is unlikely in natural transition as a result of the initial growth of what we call the ‘‘minus’’ modes and consequent forcing of Orr–Sommerfeld modes present in the background noise. Subharmonic breakdown was achieved only when these minus modes were continuously suppressed.
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