Acoustic data are presented for horizontal intermittent slug flows of air-water mixtures and vertical flows of sand-water suspensions. For the suspensions, glass beads were used to simulate the solid content. The ultrasonic apparatus consisted of one pulse-echo transducer and three receivers. For the intermittent flows, the ultrasonic apparatus was used together with simultaneous high-speed filming. Data were then obtained for the acoustic attenuation and transit time. Variations in these parameters as a function of solid concentration were compared with data in the literature. For the intermittent flows, the bubble / liquid slug transitions were detected using the ultrasonic data. It was then possible to calculate parameters related to the flow structure.
Application of the Ultrasonic Technique for Monitoring Intermittent Liquid-Gas and Liquid-Solid Flows
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Tanahashi, E.I., Paiva, T.A., Carvalho, R.D.M., Venturini, O.J., Grangeiro, F.A., Bannwart, A.C., and V.C. Bizotto. "Application of the Ultrasonic Technique for Monitoring Intermittent Liquid-Gas and Liquid-Solid Flows." Paper presented at the 7th North American Conference on Multiphase Technology, Banff, Canada, June 2010.
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