ISSN:
1573-1987
Keywords:
subharmonic transition
;
Tollmien-Schlichting waves
;
secondary instability
;
direct numerical simulation
;
symmetry breaking
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract 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 A-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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01082512
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