Gas hold-up and liquid film thickness in Taylor flow in rectangular micro channels

M.J.F. Warnier, E.V. Rebrov, M.H.J.M. Croon, de, V. Hessel, J.C. Schouten

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53 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)S153-S158
JournalChemical Engineering Journal
Volume135S
Issue numberSupplement 1
DOIs
Publication statusPublished - 2008

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