The Proceedings of the Fluids engineering conference
Online ISSN : 2424-2896
2009
Session ID : G203
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G203 The relationship between time-spatial fluctuation of void fraction and liquid-phase flow structure
Masamori HIGUCHIRyota IMAIZUMITakayuki SAITO
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
Quantitatively characterizing long-period fluctuations, which reflect the large-scale structure of a bubbly flow in a bubble column reactor, is essential to improving the reactor efficiency. First, in order to extract long-period fluctuations of bubbly flow, we proposed a newly developed method to extract the long-period fluctuations based on point-wise void fraction measurements. Analyzing the time-series point-wise void fractions measured via Four-Tip Optical-fiber Probe (F-TOP), we demonstrate that the long-period fluctuations can be extracted via wave form analysis. Second, we measured point-wise liquid-phase motion via Laser Doppler Anemometry (LDA) at the same time with the point-wise void fraction measurements. As a result, we observed that the characteristic bubble-swarm forms surrounding liquid-phase motion.
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© 2009 The Japan Society of Mechanical Engineers
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