Air bubble propagation mechanism in a rectangular elasto-rigid channel

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dc.contributor.authorRojas, N. O.
dc.date.accessioned2025-01-20T23:52:12Z
dc.date.available2025-01-20T23:52:12Z
dc.date.issued2021
dc.description.abstractA peeling bubble of air propagates when a newborn breathes for the first time. In experimental conditions, peeling fingers are unstable depending on the cross-sectional area and capillary thresholds. In this work, the deformation of a thin elastic membrane on top of a channel and its interaction with the boundary layer/solid plate yields interface wavenumbers in agreement with K41 theory defining inertial, turbulent, and dissipative regimes. Three-dimensional solutions of the minimal set of equations at the low stiffness and low capillary ranges yield symmetric round-type bubbles in numerical simulations. The mechanism responsible for the increase/decrease in the air bubble speed at large time scales is related to the wetting ridge gradient developed around the finger that defines two sorts of propagation: (i) the speed of the bubble decreases transferring energy to the membrane-fluid interface and (ii) the air finger increases its speed as it obtains energy from the elastic membrane and fluid layer, decreasing their temperature. The menisci at the bubble-liquid-shell interface are triggered by elastic and capillary forces that deform the interface around the finger, and the scale of these ridges is of the order of the elastocapillary length.
dc.fuente.origenWOS
dc.identifier.doi10.1063/5.0038079
dc.identifier.eissn1089-7666
dc.identifier.issn1070-6631
dc.identifier.urihttps://doi.org/10.1063/5.0038079
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94898
dc.identifier.wosidWOS:000631032300003
dc.issue.numero3
dc.language.isoen
dc.revistaPhysics of fluids
dc.rightsacceso restringido
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleAir bubble propagation mechanism in a rectangular elasto-rigid channel
dc.typeartículo
dc.volumen33
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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