Void Fraction Measurement Techniques for Gas-Liquid Bubbly Flows in Closed Conduits; A Literature Reviewby Mahmood Naghash, Bechtel Corp, Gaithersburg, United States,
Abstract: This paper provides a review of void fraction measuring techniques for gas-liquid bubbly flows in closed conduits with emphasis on the suitability of these methods for air-water bubbly flows in reaeration applications. The techniques addressed include Electrical Conductance Probes, Radiation Attenuation Techniques, Optical Probes, and Thermal Anemometers. Each technique is described and the principles of measurement and applications are provided.
Subject Headings: Flow measurement | Gas flow | Probe instruments | Air flow | Confined flow | Water flow | Voids | Conduits
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