Role of the Channel Geometry on the Bubble Pinch-Off in Flow-Focusing Devices

B. Dollet; W. van Hoeve; Jan-Paul Raven; P.G.M. Marmottant; Michel Versluis

doi:10.1103/PhysRevLett.100.034504

Role of the Channel Geometry on the Bubble Pinch-Off in Flow-Focusing Devices

B. Dollet, W. van Hoeve, Jan-Paul Raven, P.G.M. Marmottant, Michel Versluis

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

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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~tau1/3 between the neck width wm and the time tau before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.

Original language	Undefined
Pages (from-to)	034504-1-034504-4
Number of pages	4
Journal	Physical review letters
Volume	100
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.100.034504
Publication status	Published - 2008

Keywords

IR-59967
METIS-245577

Access to Document

10.1103/PhysRevLett.100.034504

role_of_the_channel

Cite this

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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~tau1/3 between the neck width wm and the time tau before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.",

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AU - Dollet, B.

AU - van Hoeve, W.

AU - Raven, Jan-Paul

AU - Marmottant, P.G.M.

AU - Versluis, Michel

PY - 2008

Y1 - 2008

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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~tau1/3 between the neck width wm and the time tau 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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