Bubble formation in high-viscosity liquids in step-emulsification microdevices

다국어 초록 (Multilingual Abstract)

Bubble formation in high-viscosity liquids in step-emulsification microdevices is presented. Nitrogen isused as the dispersed phase. Glycerol aqueous solutions with concentration more than 60% (w/w) areused as the continuous phase to show the effect of high viscosity liquid. It was found that the transitionof flow patterns of gas–liquid two-phase flow can be divided into two categories: bubbly flow and parallelflow. Compared with the cases in low viscosity liquid, the wettability with wall was deteriorated andthe resistance in chamber were enhanced, greatly. All of these effects cause different performance ofinterface evolution during bubble formation and the volume and formation frequency after pinchingoff. Therefore, the relative magnitude of pressure variation between chamber and gas inlet was changedto affect the flow pattern and monodispersity when the operation conditions were changed.

참고문헌 (Reference)

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