Patterns of a slow air-water flow in a semispherical container

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Patterns of a slow air-water flow in a semispherical container. / Balci, Adnan; Brøns, Morten; Herrada, Miguel A.; Shtern, Vladimir N.

In: European Journal of Mechanics B - Fluids, Vol. 58, 2016, p. 1-8.

Research output: Contribution to journalJournal article – Annual report year: 2016Researchpeer-review

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@article{839fa8699d844e8a9e4f4f9cca255e44,
title = "Patterns of a slow air-water flow in a semispherical container",
abstract = "This numerical study analyzes the development of eddies in a slow steady axisymmetric air-water flow in a sealed semispherical container, driven by a rotating top disk. As the water height, Hw, increases, new flow cells emerge in both water and air. First, an eddy emerges near the axis-bottom intersection. Then this eddy expands and reaches the interface, inducing a new cell in the air flow. This cell appears as a thin near-axis layer which then expands and occupies the entire air domain. As the disk rotation intensifies at Hw = 0.8, the new air cell shrinks to the axis and disappears. The bulk water circulation becomes separated from the interface by a thin layer of water counter-circulation. These changes in the flow topology occur due to (a) competing effects of the air meridional flow and swirl, which drive meridional motions of opposite directions in water, and (b) feedback of water flow on the air flow. In contrast to flows in cylindrical and conical containers, there is no interaction with Moffatt corner vortices here.",
keywords = "Swirling motions, Two-fluid flows, Viscous incompressible fluids, Sealed container, Changes in flow topology",
author = "Adnan Balci and Morten Br{\o}ns and Herrada, {Miguel A.} and Shtern, {Vladimir N.}",
year = "2016",
doi = "10.1016/j.euromechflu.2016.03.004",
language = "English",
volume = "58",
pages = "1--8",
journal = "European Journal of Mechanics B - Fluids",
issn = "0997-7546",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Patterns of a slow air-water flow in a semispherical container

AU - Balci, Adnan

AU - Brøns, Morten

AU - Herrada, Miguel A.

AU - Shtern, Vladimir N.

PY - 2016

Y1 - 2016

N2 - This numerical study analyzes the development of eddies in a slow steady axisymmetric air-water flow in a sealed semispherical container, driven by a rotating top disk. As the water height, Hw, increases, new flow cells emerge in both water and air. First, an eddy emerges near the axis-bottom intersection. Then this eddy expands and reaches the interface, inducing a new cell in the air flow. This cell appears as a thin near-axis layer which then expands and occupies the entire air domain. As the disk rotation intensifies at Hw = 0.8, the new air cell shrinks to the axis and disappears. The bulk water circulation becomes separated from the interface by a thin layer of water counter-circulation. These changes in the flow topology occur due to (a) competing effects of the air meridional flow and swirl, which drive meridional motions of opposite directions in water, and (b) feedback of water flow on the air flow. In contrast to flows in cylindrical and conical containers, there is no interaction with Moffatt corner vortices here.

AB - This numerical study analyzes the development of eddies in a slow steady axisymmetric air-water flow in a sealed semispherical container, driven by a rotating top disk. As the water height, Hw, increases, new flow cells emerge in both water and air. First, an eddy emerges near the axis-bottom intersection. Then this eddy expands and reaches the interface, inducing a new cell in the air flow. This cell appears as a thin near-axis layer which then expands and occupies the entire air domain. As the disk rotation intensifies at Hw = 0.8, the new air cell shrinks to the axis and disappears. The bulk water circulation becomes separated from the interface by a thin layer of water counter-circulation. These changes in the flow topology occur due to (a) competing effects of the air meridional flow and swirl, which drive meridional motions of opposite directions in water, and (b) feedback of water flow on the air flow. In contrast to flows in cylindrical and conical containers, there is no interaction with Moffatt corner vortices here.

KW - Swirling motions

KW - Two-fluid flows

KW - Viscous incompressible fluids

KW - Sealed container

KW - Changes in flow topology

U2 - 10.1016/j.euromechflu.2016.03.004

DO - 10.1016/j.euromechflu.2016.03.004

M3 - Journal article

VL - 58

SP - 1

EP - 8

JO - European Journal of Mechanics B - Fluids

JF - European Journal of Mechanics B - Fluids

SN - 0997-7546

ER -