Article ID Journal Published Year Pages File Type
153724 Chemical Engineering Journal 2008 6 Pages PDF
Abstract

The gas hold-up in nitrogen/water Taylor flows in a glass microchannel of rectangular cross-section (100 μm × 50 μm) was shown to follow the Armand correlation. The validity of the Armand correlation implies that the liquid film thickness is not a function of the bubble velocity, which was varied between 0.24 and 7.12 m/s. Images of the Taylor flow were captured at a rate of 10,000 frames per second and were used to obtain the bubble and liquid slug lengths, the bubble velocity, and the number of bubbles formed per unit of time. A mass balance-based model was developed for Taylor flow with negligible liquid film velocities. The model describes the gas hold-up as a function of the liquid film thickness, the bubble and liquid slug lengths, the liquid superficial velocity, and the bubble formation frequency.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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