On the mechanism of turbulence suppression by spanwise surface oscillations
作者： N. V. Nikitin
DOI: 10.1007/BF02831425
关键词: Classical mechanics 、 Physics 、 Direct numerical simulation 、 Flow (psychology) 、 Turbulence 、 Computer simulation 、 Mechanics 、 Attenuation 、 Vortex 、 Oscillation 、 Pipe flow
摘要: The attenuation of turbulent pulsations in near-wall flows by means spanwise periodic surface oscillation is examined. A direct numerical simulation the flow a circular pipe with imposed rotational oscillations has shown that for Re=4000 and optimal frequency, degree turbulence increases increase amplitude until relaminarizes. estimated frequency ω+=0.06. results applying theory development coherent structures agree qualitatively those simulation. It concluded intensity reduced because movements weaken longitudinal vortices which cause bursts flows.
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