Abstract
Abstract Pressure transducer measurements, recorded while calibrating two conductivity-based, void fraction meters, show how the propagation velocity of pressure waves in bubbly air-water flows varies with void fraction. The results for void fractions between 0 and 0.5 indicate that, as expected, the propagation velocities in an air-water mixture are considerably lower than the speed of sound in either component; they agree well with prediction methods based on the mixture density and bulk modulus.
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