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Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions

Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions, Nasim Hooshyar, J. Ruud van Ommen, Peter J. Hamersma, Sankaran Sundaresan, and Robert F. Mudde. Physical Review Letters 2013, 110  (24), 244501.

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Abstract

We experimentally investigate the effect of particles on the dynamics of a gas bubble rising in a liquid-solid suspension while the particles are equally sized and neutrally buoyant. Using the Stokes number as a universal scale, we show that when a bubble rises through a suspension characterized by a low Stokes number (in our case, small particles), it will hardly collide with the particles and will experience the suspension as a pseudoclear liquid. On the other hand, when the Stokes number is high (large particles), the high particle inertia leads to direct collisions with the bubble. In that case, Newton's collision rule applies, and direct exchange of momentum and energy between the bubble and the particles occurs. We present a simple theory that describes the underlying mechanism determining the terminal bubble velocity.

BibTeX

@article{ ISI:000320282600006,
Author = {Hooshyar, Nasim and van Ommen, J. Ruud and Hamersma, Peter J. and Sundaresan, Sankaran and Mudde, Robert F.},
Title = {Dynamics of Single Rising Bubbles in Neutrally Buoyant Liquid-Solid Suspensions},
Journal = {Physical Review Letters},
Year = {2013},
Volume = {110},
Number = {24},
Month = {},
Abstract = {We experimentally investigate the effect of particles on the dynamics of a gas bubble rising in a liquid-solid suspension while the particles are equally sized and neutrally buoyant. Using the Stokes number as a universal scale, we show that when a bubble rises through a suspension characterized by a low Stokes number (in our case, small particles), it will hardly collide with the particles and will experience the suspension as a pseudoclear liquid. On the other hand, when the Stokes number is high (large particles), the high particle inertia leads to direct collisions with the bubble. In that case, Newton's collision rule applies, and direct exchange of momentum and energy between the bubble and the particles occurs. We present a simple theory that describes the underlying mechanism determining the terminal bubble velocity.},
DOI = {10.1103/PhysRevLett.110.244501},
Pages = {244501},
ISSN = {0031-9007},
ResearcherID-Numbers = {van Ommen, Ruud/A-4119-2009},
ORCID-Numbers = {van Ommen, Ruud/0000-0001-7884-0323},
Unique-ID = {ISI:000320282600006},
}

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