Growth of a bubble cloud in CO2-saturated water under microgravity

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Show simple item record Vega Martínez, Patricia Rodríguez Rodríguez, Francisco Javier Van Der Meer, Devaraj 2021-05-11T11:26:00Z 2021-05-28T23:00:04Z 2020-05-28
dc.identifier.bibliographicCitation Vega-Martínez, P., Rodríguez-Rodríguez, J. & van der Meer, D. (2020). Growth of a bubble cloud in CO2-saturated water under microgravity. Soft Matter, 16(20), pp. 4728–4738.
dc.identifier.issn 1744-683X
dc.description.abstract The diffusion-driven growth of a dense cloud of bubbles immersed in a gas-supersaturated liquid is a problem that finds applications in several modern technologies such as solvent-exchange micro-reactors, nanotechnology or the manufacturing of foamy materials. However, under Earth's gravity conditions, these dynamics can only be observed for a very limited time if the cloud is not attached to a surface, due to the action of buoyancy, i.e. of gravity effects. Here, we present experimental observations of the time evolution of dense bubble clouds growing in CO2-supersaturated water under microgravity conditions. We report the existence of three regimes where the bubble cloud exhibits different growth rates. At short times, each bubble grows independently following the Epstein–Plesset equation. Later on, bubbles start to interact with each other and their growth rate diminishes as they compete for the available CO2. When this happens, the growth rate slows down. This occurs earlier the deeper the bubble is in the cloud. Finally, at long times, only those bubbles on the husk continue growing. These regimes may be qualitatively described by a mathematical model where each individual bubble grows in the presence of a constellation of point mass sinks. Despite the model being only valid for dilute bubble clouds, its predictions are consistent with the experimental observations, even though the bubble clouds we observe are rather dense.
dc.format.extent 11
dc.language.iso eng
dc.publisher Royal Society of Chemistry
dc.rights © The Royal Society of Chemistry 2020
dc.title Growth of a bubble cloud in CO2-saturated water under microgravity
dc.type article
dc.subject.eciencia Química
dc.identifier.doi 10.1039/d0sm00015a
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 4728
dc.identifier.publicationissue 20
dc.identifier.publicationlastpage 4738
dc.identifier.publicationtitle Soft Matter
dc.identifier.publicationvolume 16
dc.identifier.uxxi AR/0000025699
carlosiii.embargo.terms 2021-05-28
dc.affiliation.dpto UC3M. Departamento de Ingeniería Térmica y de Fluidos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Mecánica de Fluidos
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