ORCID Profile
0000-0003-2740-3259
Current Organisations
Monash University Malaysia
,
Rutgers Cancer Institute of New Jersey
,
Sloan Kettering Institute
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Publisher: Springer Science and Business Media LLC
Date: 24-05-2023
Publisher: Public Library of Science (PLoS)
Date: 03-10-2014
Publisher: Springer Science and Business Media LLC
Date: 26-07-2016
Publisher: AIP Publishing
Date: 03-2011
DOI: 10.1063/1.3560386
Abstract: The vortex breakdown inside a cylinder with a rotating top lid is controlled experimentally by injecting at the bottom a fluid with a small density difference. The density difference is obtained by mixing a heavy dye or alcohol with water in order to create a jet denser or lighter than water. The injection of a heavy fluid creates a buoyancy force downward, which counteracts the meridional recirculation in the cylinder and thus enhances the formation of a vortex breakdown bubble. The stability diagram shows that even a very small density difference of 0.02% is able to decrease by a factor of 2 the critical Reynolds number of appearance of the breakdown. On the other hand, the injection of a lighter fluid does not destroy the vortex breakdown. However, for large enough density differences (larger than 0.03%), the lighter fluid is able to pierce through the bubble and leads to a new structure of the vortex breakdown. Finally, a parallel is drawn between a light jet and a vortex ring generated at the bottom of the cylinder: strong vortex rings are able to pierce through the bubble, whereas weak vortex rings are simply advected around the bubble.
Publisher: Public Library of Science (PLoS)
Date: 11-06-2013
Publisher: MDPI AG
Date: 17-10-2014
DOI: 10.3390/PR2040753
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
Location: Greece
Location: United States of America
Location: No location found
No related grants have been discovered for Constantinos Zambirinis.