The effect of the size of square microchannels on hydrodynamics and mass transfer during liquid-liquid slug flow
| Autor: | Bengt Sundén, Zan Wu, Mohsen Nasr Esfahany, Mehdi Sattari-Najafabadi |
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| Rok vydání: | 2017 |
| Předmět: |
Mass transfer coefficient
Environmental Engineering Microchannel Chemistry General Chemical Engineering Flow (psychology) Analytical chemistry 02 engineering and technology Mechanics 010402 general chemistry 021001 nanoscience & nanotechnology Slug flow 01 natural sciences Square (algebra) 0104 chemical sciences law.invention Flow velocity law Mass transfer 0210 nano-technology Spark plug Biotechnology |
| Zdroj: | AIChE Journal. 63:5019-5028 |
| ISSN: | 0001-1541 |
| DOI: | 10.1002/aic.15822 |
| Popis: | The present study investigated the influence of square microchannel size on hydrodynamics and mass transfer in the liquid-liquid slug flow regime. Three square microchannels with the hydraulic diameters of 200, 400 and 600 µm were used. The employed method for estimating mass transfer coefficients remarkably increased the accuracy of the results. The findings revealed that decreasing the microchannel size improved the interfacial area due to plug length enlargement and deteriorated mass transfer resistances because of augmented internal circulations, leading to the considerable enhancement of mass transfer coefficients. The increasing effect on the overall mass transfer coefficient became greater with flow velocity, showing that size effect on mass transfer resistances was more profound at higher flow velocities. The influence of size on the interfacial area was significantly greater than that on mass transfer resistances due to the significant increment of wall film length with the decrease in channel size. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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