SUBHARMONIC TRANSITION TO TURBULENCE IN CHANNEL FLOW

被引：3
|
作者：
HARTEL, C
KLEISER, L
机构：
[1] DLR, Institute for Theoretical Fluid Mechanics, Göttingen, D-3400
来源：
APPLIED SCIENTIFIC RESEARCH | 1993年 / 51卷 / 1-2期
关键词：
SUBHARMONIC TRANSITION; TOLLMIEN-SCHLICHTING WAVES; SECONDARY INSTABILITY; DIRECT NUMERICAL SIMULATION; SYMMETRY BREAKING;
D O I：
10.1007/BF01082512
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A direct numerical simulation of subharmonic transition to turbulence in channel flow has been performed. The stages of primary and secondary instability have been identified in the results leading to a staggered pattern of LAMBDA-shaped vortices. The associated staggered symmetry has been found to persist up to rather late stages of the breakdown process. This symmetry rapidly disappears in the final stage of transition and a developed turbulent flow is attained. A pronounced difference in the development between the two channel halves is observed which is consistent with the predictions of secondary instability theory.
引用
收藏
页码：43 / 47
页数：5
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