Gas-liquid mass transfer intensification for bubble generation and breakup in micronozzles
| Autor: | Lena Mensing, Felix Reichmann, Jakob Herath, Norbert Kockmann |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Fluid Flow and Transfer Processes
Pressure drop Materials science Turbulence Bubble Organic Chemistry Nozzle Resazurin oxidation Laminar flow 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Slug flow Breakup Micronozzle Physics::Fluid Dynamics Gas-liquid mass transfer 020401 chemical engineering Chemistry (miscellaneous) Mass transfer Bubble breakup 0204 chemical engineering 0210 nano-technology |
| Popis: | The local gas-liquid mass transfer was characterized during bubble generation in T-contactors and in an adjacent micronozzle. A colorimetric technique with the oxygen sensitive dye resazurin was investigated to visualize gas-liquid mass transfer during slug flow, bubble deformation, as well as laminar and turbulent bubble breakup in the wake of a micronozzle. Two optimized nozzle geometries from previous studies were evaluated concerning volumetric mass transfer coefficients for low pressure loss, narrow residence time distribution, or high dispersion rates. Highest values in kla up to 60 s−1 were found for turbulent bubble breakup and an optimized micronozzle design in respect to pressure drop and dispersion rate. The achieved mass transfer coefficients were correlated with the energy dissipation rate within the micronozzles and with the inverse Kolmogorov time scale in vortex dissipation in good agreement for laminar and turbulent breakup regimes. Journal of flow chemistry;Vol. 11. 2021, issue 3, pp 429–444 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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