Measurements of bubble size and velocity in multiphase flows are important in much research and many industrial applications. It has been found that high-order refractions have great impact on microbubble sizing by use of phase-Doppler anemometry (PDA). The problem has been investigated, and a model of phase-size correlation, which also takes high-order refractions into consideration, is introduced to improve the accuracy of bubble sizing. Hence the model relaxes the assumption of a single-scattering mechanism in a conventional PDA system. The results of simulation based on this new model are compared with those based on a single-scattering-mechanism approach or a first-order approach. An optimization method for accurately sizing air bubbles in water has been suggested.
© 2003 Optical Society of America
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.2490) Remote sensing and sensors : Flow diagnostics
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(280.7250) Remote sensing and sensors : Velocimetry
Huihe Qiu, "Eliminating high-order scattering effects in optical microbubble sizing," J. Opt. Soc. Am. A 20, 690-697 (2003)