Instabilities in a Liquid-Fluidized Bed of Gas Bubbles

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Physical Sciences and Mathematics
Physics
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Vera, M. U
Saint-Jalmes, A.
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Gas bubbles in an aqueous foam can be unjammed, or fluidized, by introducing a forced flow of the continuous liquid phase at a sufficiently high rate. We observe that the resulting bubble dynamics are spatially inhomogeneous, exhibiting a sequence of instabilities vs increasing flow rate. First irregular swirls appear, then a single convective roll, and finally a series of stratified convection rolls each with a different average bubble size.

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2000-03-27
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Physical Review Letters
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At the time of publication, author Douglas J. Durian was affiliated with University of California, Los Angeles. Currently, he is a faculty member at the Physics Department at the University of Pennsylvania.
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