The principle of the critical angle refractometry and sizing technique is extended to characterize the size distribution and the mean refractive index of clouds of bubbles. For a log-normal bubble-size distribution, simulations show that the mean size, the relative width of the size distribution, and the mean refractive index of the bubbles have a particular and easily identified influence on the critical scattering patterns. Preliminary experimental results on air bubble/water flows clearly demonstrate the potential and robustness of this new technique for bubbly flow characterization.
© 2007 Optical Society of America
Original Manuscript: March 30, 2007
Manuscript Accepted: May 4, 2007
Published: July 13, 2007
Fabrice Onofri, Mariusz Krysiek, and Janusz Mroczka, "Critical angle refractometry and sizing of bubble clouds," Opt. Lett. 32, 2070-2072 (2007)