Abstract
A non-intrusive technique to measure the two-dimensional distribution of line averaged void fraction in a two-phase flow is discussed. A CCD camera is used to measure the attenuation of light as it passes through a bubbly flow, and this attenuation is related to the bubble concentration. The technique is appropriate for microbubbly flows where the bubble size is much smaller than the area imaged by a single pixel and where there are many bubbles attenuating light within each pixel. The measurement system is calibrated by using a two-dimensional line source microbubble plume as a reference.
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Revised: 30 March 2000/Accepted: 14 April 2000
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Leppinen, D., Dalziel, S. A light attenuation technique for void fraction measurement of microbubbles. Experiments in Fluids 30, 214–220 (2001). https://doi.org/10.1007/s003480000158
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DOI: https://doi.org/10.1007/s003480000158