Direct observation of the intermittency of intense vorticity filaments in turbulence
1991; American Physical Society; Volume: 67; Issue: 8 Linguagem: Inglês
10.1103/physrevlett.67.983
ISSN1092-0145
AutoresStéphane Douady, Y. Couder, Marc Brächet,
Tópico(s)Fluid Dynamics and Heat Transfer
ResumoCavitation in a liquid seeded with bubbles is used as a new visualization technique to single out the regions of very low pressure of a fully developed turbulent flow. By this means, the sudden appearance of high vorticity filaments is observed. These structures are very thin and short lived and display a high degree of temporal as well as spatial intermittency. They contribute to the flow organization: In particular their disintegration corresponds to the formation of large eddies.
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