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Intermittency in separated flows through sudden expansions in axisymmetric channels at subcritical Reynolds numbers
Molochnikov V. M.
1, Pashkova N. D.
1
1Institute of Power Engineering and Advanced Technologies, Federal Research Center, Kazan Scientific Center of the Russian Academy of Sciences, Kazan, Russia
Email: vmolochnikov@mail.ru, pashkova-2000@mail.ru
Flow intermittency in flows through sudden expansions in axisymmetric channels was investigated experimentally at subcritical Reynolds numbers. The intermittency coefficient in the flow reattachment region was shown to depend on the Reynolds number. The study proposes a mechanism behind regular turbulization of flow in the separation region. Keywords: sudden expansion, flow visualization, amplitude of velocity fluctuation, turbulization of flow, intermittency, vortical structures.
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