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Tube geometry can force switchlike transitions in the behavior of propagating bubbles

Phys. Fluids 21, 101702 (2009); doi:10.1063/1.3247879

Published 9 October 2009

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A. de Lózar,1,2 A. Heap,1 F. Box,1 A. L. Hazel,1 and A. Juel1
1Manchester Centre for Nonlinear Dynamics and School of Mathematics, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
2Max Planck Institute for Dynamics and Self-Organization, Bunsenstr. 10, Göttingen 37073, Germany
Microscale process engineering requires precise control of bubbles and droplets. We investigate geometry-induced control and find that a centered constriction in the cross section of rectangular tubes can lead to new families of steadily propagating bubbles, which localize in the least-constricted regions of the cross section. Tuning the constriction geometry can cause a switchlike transition from centered to localized bubbles at a critical value of the flow rate: a mechanism for flow-rate-driven bubble control. The accompanying large change in bubble volume could be significant for liquid recovery applications. ©2009 American Institute of Physics
History: Received 27 July 2009; accepted 23 September 2009; published 9 October 2009
Permalink: http://link.aip.org/link/?PHFLE6/21/101702/1
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ISSN:
1070-6631 (print)   1089-7666 (online)
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REFERENCES (22)
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