Abstract
A new optical method for cross-sectional phase distribution measurement of slug flow in small channels is proposed in this work. The new method uses two high-speed CMOS array sensors to obtain two light intensity distributions (the horizontal and the vertical light intensity distributions), and hence to determine the cross-sectional phase distribution of the two-phase flow. The adjustable ellipse model is introduced to characterize the cross-sectional phase distribution. The relationships between the parameters of cross-sectional phase distribution and the two light intensity distributions are investigated and new correlations are established. The phase distribution measurement model is developed and the liquid film thickness is estimated. Experiments are carried out in three glass tubes with different inner diameters of 4.82, 3.28 and 2.30 mm, respectively. The results indicate that the proposed method can faithfully measure the cross-sectional phase distribution of slug flow in small channels. Meanwhile, the estimated liquid film thicknesses are in accord with those calculated by existing empirical correlations.
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The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.
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This work is supported by the National Nature Science Foundation of China No. 61573312 and State Key Laboratory of Industrial Control Technology ICT1909.
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H.J collected resources and performed project administration and funding acquisition. H.J., Z.H., Y.H. were responsible for writing—review and editing. H.J. and Z.H. performed supervision. Software, validation, investigation, data curation, writing—original draft preparation, visualization and formal analysis were performed by Y.X. and Z.D. Conceptualization was performed by H.J., Y.X. and Z.D. Methodology was performed by H.J., Y.X, Z.D., B.W., Y.H. and Z.H.
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Xu, Y., Dai, Z., Ji, H. et al. Cross-sectional phase distribution measurement of slug flow in small channels. Exp Fluids 62, 228 (2021). https://doi.org/10.1007/s00348-021-03327-z
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DOI: https://doi.org/10.1007/s00348-021-03327-z