Monodispersed microbubble production using modified micro-Venturi bubble generator

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Abstract

This paper presents an innovative method to produce controlled monodispersed bubbles using a modified micro-Venturi channel. The influence of flow control parameters such as liquid pressure and gas flow rate on the controlled generation of micro-bubbles was investigated. Experiments were conducted in a transparent modified micro-Venturi channel, having a depth of 40 μm, in which monodispersed gas bubbles were generated. The proposed design provides a new configuration to produce monodispersed microbubbles. Image analysis focused at the vena-contracta region showed that the geometry of generated microbubbles change suddenly from an ellipsoidal shape to a circular shape having a constant diameter. The dynamics of the bubble breakup mechanism in a modified micro-Venturi channel has been described. It was observed that the velocity and the size of the micro-bubbles were strongly dependent on the flow control parameters. The bubble frequency was linearly increasing with respect to gas mass flow rates.

Original languageBritish English
Article number095306
JournalAIP Advances
Volume10
Issue number9
DOIs
StatePublished - 1 Sep 2020

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