Artículo
Column formation and hysteresis in a two-fluid tornado
Autor/es | Sharifullin, B. R.
Naumov, I. V. Herrada Gutiérrez, Miguel Ángel Shtern, Vladimir N. |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos |
Fecha de publicación | 2018 |
Fecha de depósito | 2018-06-08 |
Publicado en |
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Resumen | This experimental and numerical study addresses a flow of water and sunflower oil. This flow is driven by the rotating lid in a sealed vertical cylinder. The experiments were performed in a glass container with a radius ... This experimental and numerical study addresses a flow of water and sunflower oil. This flow is driven by the rotating lid in a sealed vertical cylinder. The experiments were performed in a glass container with a radius of 45 mm and a height of 45 mm with the water volume fraction of 20%. Different densities and immiscibility of liquids provide the stable and sharp interface. At the rest, the interface is flat and horizontal. As the rotation speeds up, a new water-flow cell emerges near the bottom center. This cell expands and occupies almost the entire water domain while the initial water circulation shrinks into a thin layer adjacent to the interface. The water, rising near the container axis, strongly deforms the interface (upward near the axis and downward near the sidewall). A new oil-flow cell emerges above the interface near the axis. This cell disappears as the interface approaches the lid. The water separates from the sidewall, reaches the lid, and forms a column. As the rotation is decreased, the scenario reverses, but the flow states differ from those for the increasing rotation, i.e., a hysteresis is observed. The numerical simulations agree with the experiment and help explain the flow metamorphoses. |
Agencias financiadoras | Russian Science Foundation |
Identificador del proyecto | 14-29-00093 |
Cita | Sharifullin, B.R., Naumov, I.V., Herrada Gutiérrez, M.Á. y Shtern, V.N. (2018). Column formation and hysteresis in a two-fluid tornado. Journal of Physics: Conference Series, 980, 012008-1-012008-6. |
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Column formation and hysteresis.pdf | 476.9Kb | [PDF] | Ver/ | |