Role of the channel geometry on the bubble pinch-off in flow-focusing devices

Benjamin Dollet; Wim Van Hoeve; Jan Paul Raven; Philippe Marmottant; Michel Versluis

doi:10.1103/PhysRevLett.100.034504

Role of the channel geometry on the bubble pinch-off in flow-focusing devices

Benjamin Dollet
, Wim Van Hoeve
, Jan Paul Raven
, Philippe Marmottant
, Michel Versluis

University of Twente
IPR (Institut de Physique de Rennes) - UMR 6251
Physics of Fluids
Lab. de Spectrometrie Physique
Laboratoire Interdisciplinaire de Physique

Research output: Contribution to journal › Article › peer-review

222 Citations (Scopus)

Abstract

The formation of bubbles by flow focusing of a gas and a liquid in a rectangular channel is shown to depend strongly on the channel aspect ratio. Bubble breakup consists in a slow linear 2D collapse of the gas thread, ending in a fast 3D pinch-off. The 2D collapse is predicted to be stable against perturbations of the gas-liquid interface, whereas the 3D pinch-off is unstable, causing bubble polydispersity. During 3D pinch-off, a scaling wm∼τ1/3 between the neck width wm and the time τ before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.

Original language	English
Article number	034504
Journal	Physical Review Letters
Volume	100
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.100.034504
Publication status	Published - 25 Jan 2008
Externally published	Yes

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title = "Role of the channel geometry on the bubble pinch-off in flow-focusing devices",

abstract = "The formation of bubbles by flow focusing of a gas and a liquid in a rectangular channel is shown to depend strongly on the channel aspect ratio. Bubble breakup consists in a slow linear 2D collapse of the gas thread, ending in a fast 3D pinch-off. The 2D collapse is predicted to be stable against perturbations of the gas-liquid interface, whereas the 3D pinch-off is unstable, causing bubble polydispersity. During 3D pinch-off, a scaling wm∼τ1/3 between the neck width wm and the time τ before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.",

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AU - Dollet, Benjamin

AU - Van Hoeve, Wim

AU - Raven, Jan Paul

AU - Marmottant, Philippe

AU - Versluis, Michel

PY - 2008/1/25

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AB - The formation of bubbles by flow focusing of a gas and a liquid in a rectangular channel is shown to depend strongly on the channel aspect ratio. Bubble breakup consists in a slow linear 2D collapse of the gas thread, ending in a fast 3D pinch-off. The 2D collapse is predicted to be stable against perturbations of the gas-liquid interface, whereas the 3D pinch-off is unstable, causing bubble polydispersity. During 3D pinch-off, a scaling wm∼τ1/3 between the neck width wm and the time τ before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.

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DO - 10.1103/PhysRevLett.100.034504

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ER -

Role of the channel geometry on the bubble pinch-off in flow-focusing devices

Abstract

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