We describe a simple technique for measuring high (up to 0.16) time-averaged solids volumetric concentration in a two-phase flow. The technique is based on a properly modified version of the forward scattering of laser light. It is useful in a variety of practical configurations, and, in particular, it is instrumental in the diagnostics of particle flow in the free board of bubbling fluidized beds and in the circulating fluidized beds. A fallout of this work is the measurement of the extinction coefficient of the solid material tested.
© 1990 Optical Society of America
Antonello Cutolo, Ivo Rendina, Umberto Arena, Antonio Marzocchella, and Leopoldo Massimilla, "Optoelectronic technique for the characterization of high concentration gas-solid suspension," Appl. Opt. 29, 1317-1322 (1990)