Coalescence of diffusively growing gas bubbles

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Show simple item record Moreno Soto, Álvaro Maddalena, Tom Fraters, Arjan Van Der Meer, Devaraj Lohse, Detlef 2022-02-01T11:09:30Z 2022-02-01T11:09:30Z 2018-07-10
dc.identifier.bibliographicCitation Moreno Soto, L., Maddalena, T., Fraters, A., van der Meer, D. & Lohse, D. (2018). Coalescence of diffusively growing gas bubbles. Journal of Fluid Mechanics, 846, 143–165.
dc.identifier.issn 0022-1120
dc.description.abstract Under slightly supersaturated conditions, bubbles need many minutes to grow due to the low gas diffusivity in liquids. When coalescence occurs, the fact that the bubbles have diffusively grown on top of a surface allows for control with precision of the location and the timing at which the coalescence takes place. Numerous coalescences of two CO2 microbubbles in water are recorded at a frame rate of ∼65000 fps . The evolution of the coalescing process is analysed in detail, differentiating among three phases: neck formation, wave propagation along the bubble surface and bubble detachment. First of all, the formation of the collapsing neck between both bubbles is compared to a capillary–inertial theoretical model. Afterwards, the propagating deformation along the surface is characterised measuring its evolution, velocity and dominant wavelength. Once bubbles coalesce, the perturbing waves and the final shape of the new bubble breaks the equilibrium between buoyancy and capillary forces. Consequently, the coalesced bubble detaches and rises due to buoyancy, oscillating with its natural Minnaert frequency. In addition to the experiments, a boundary integral code has been used to obtain numerical results of the coalescence under similar conditions, showing excellent agreement with the experimental data.
dc.format.extent 23
dc.language.iso eng
dc.publisher Cambridge University Press
dc.rights © 2018 Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights Atribución 3.0 España
dc.subject.other Breakup/coalescence
dc.subject.other Bubble dynamics
dc.subject.other Capillary waves
dc.title Coalescence of diffusively growing gas bubbles
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.rights.accessRights openAccess
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 143
dc.identifier.publicationlastpage 165
dc.identifier.publicationtitle Journal of Fluid Mechanics
dc.identifier.publicationvolume 846
dc.identifier.uxxi AR/0000029092
dc.affiliation.dpto UC3M. Departamento de Ingeniería Aeroespacial
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Ingeniería Aeroespacial
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