Abstract
For densely binding bubble clusters, conventional image analysis methods are unable to provide an accurate measurement of the bubble size distribution because of the difficulties with clearly identifying the outline edges of individual bubbles. In contrast, the bright centroids of individual bubbles can be distinctly defined and thus accurately measured. By taking this advantage, we developed a new measurement method based on a linear relationship between the bubble radius and the radius of its bright centroid so to avoid the need to identify the bubble outline edges. The linear relationship and method were thoroughly tested for 2D bubble clusters in a highly binding condition and found to be effective and robust for measuring the bubble sizes.
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Acknowledgments
The research project has been funded by the Australia Coal Association Research Program (ACARP C20022) and the Australian Research Council (LP120100662). The authors are grateful for the help from the technicians in the laboratory of the Geotechnical Engineering Centre and Julius Kruttschnitt Mineral Research Centre at the University of Queensland. We sincerely thank the anonymous reviewer for the constructive comments.
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Ye Ma and Guanxi Yan have contributed equally to this work.
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Ma, Y., Yan, G., Scheuermann, A. et al. Size distribution measurement for densely binding bubbles via image analysis. Exp Fluids 55, 1860 (2014). https://doi.org/10.1007/s00348-014-1860-z
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DOI: https://doi.org/10.1007/s00348-014-1860-z