Vertical vibration is known to cause bubble breakup, clustering and retardation in gas-liquid systems. In a bubble column, vibration increases the mass transfer ratio by increasing the residence time and phase interfacial area through introducing kinetic buoyancy force (Bjerknes effect) and bubble breakup. Previous studies have explored the effect of vibration frequency (f), but minimal effort has focused on the effect of amplitude (A) on mass transfer intensification. Thus, the current work experimentally examines bubble size, void fraction, and mass transfer in a bubble column under relatively high amplitude vibration (1.5 mm < A <9.5 mm) over a frequency range of 7.5–22.5 Hz. Results of the present work were compared with past studies. The maximum stable bubble size under vibration was scaled using Hinze theory for breakage. Results of this work indicate that vibration frequency exhibits local maxima in both mass transfer and void fraction. Moreover, an optimum amplitude that is independent of vibration frequency was found for mass transfer enhancements. Finally, this work suggests physics-based models to predict void fraction and mass transfer in a vibrating bubble column.
Mohagheghian, Shahrouz, et al. "Study of Bubble Size, Void Fraction, and Mass Transport in a Bubble Column under High Amplitude Vibration." ChemEngineering, vol. 2, no. 2, Apr. 2018. https://doi.org/10.3390/chemengineering2020016
Mohagheghian, Shahrouz, Still, Adam L., Elbing, Brian R., & Ghajar, Afshin J. (2018). Study of Bubble Size, Void Fraction, and Mass Transport in a Bubble Column under High Amplitude Vibration. ChemEngineering, 2(2). https://doi.org/10.3390/chemengineering2020016
Mohagheghian, Shahrouz, Still, Adam L., Elbing, Brian R., et al., "Study of Bubble Size, Void Fraction, and Mass Transport in a Bubble Column under High Amplitude Vibration," ChemEngineering 2, no. 2 (2018), https://doi.org/10.3390/chemengineering2020016
@article{osti_1433552,
author = {Mohagheghian, Shahrouz and Still, Adam L. and Elbing, Brian R. and Ghajar, Afshin J.},
title = {Study of Bubble Size, Void Fraction, and Mass Transport in a Bubble Column under High Amplitude Vibration},
annote = {Vertical vibration is known to cause bubble breakup, clustering and retardation in gas-liquid systems. In a bubble column, vibration increases the mass transfer ratio by increasing the residence time and phase interfacial area through introducing kinetic buoyancy force (Bjerknes effect) and bubble breakup. Previous studies have explored the effect of vibration frequency (f), but minimal effort has focused on the effect of amplitude (A) on mass transfer intensification. Thus, the current work experimentally examines bubble size, void fraction, and mass transfer in a bubble column under relatively high amplitude vibration (1.5 mm },
doi = {10.3390/chemengineering2020016},
url = {https://www.osti.gov/biblio/1433552},
journal = {ChemEngineering},
issn = {ISSN 2305-7084},
number = {2},
volume = {2},
place = {Switzerland},
publisher = {MDPI AG},
year = {2018},
month = {04}}
Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transporthttps://doi.org/10.1115/FEDSM2013-16116