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Taylor bubble rising in a vertical pipe against laminar or turbulent downward flow: symmetric to asymmetric shape transition

Fabre, Jean and Figueroa-Espinoza, Bernardo Taylor bubble rising in a vertical pipe against laminar or turbulent downward flow: symmetric to asymmetric shape transition. (2014) Journal of Fluid Mechanics, 755. 485-502. ISSN 0022-1120

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Official URL: http://dx.doi.org/10.1017/jfm.2014.429

Abstract

The symmetry of Taylor bubbles moving in a vertical pipe is likely to break when the liquid flows downward at a velocity greater than some critical value. The present experiments performed in the inertial regime for Reynolds numbers in the range 100<Re <10000 show that bifurcation to an eccentric motion occurs, with a noticeable increase of the bubble velocity. The influence of the surface tension parameter (an inverse Eötvös number) has been investigated in the range [0.0045,0.067]. It appears that the motion of an asymmetric bubble is much more sensitive to surface tension than that of a symmetric bubble. For any given surface tension parameter, the symmetry-breaking bifurcation occurs in both laminar and turbulent flow at the same vorticity to radius ratio on the axis of the carrier fluid. This conclusion also applies to results obtained previously from numerical experiments in plane flows.

Item Type:Article
Additional Information:Thanks to Cambridge University Press editor. The original PDF of the article can be found at Journal of Fluid Mechanics website : http://journals.cambridge.org/action/displayJournal?jid=FLM
HAL Id:hal-01057117
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Universidad Nacional Autónoma de México - UNAM (MEXICO)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Jean FABRE
Deposited On:21 Aug 2014 12:55

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