title: Attenuation of ultrasound in porous media with dispersed microbubbles
abstract: The dispersion relation for a granular bed with a small amount of fine bubbles is formulated and analyzed. It is assumed that the grain size is much larger than the bubble's radius and that their volume concentration is small. The study is motivated by the problem of acoustic diagnostics of fixed bed chemical reactors operating in multiphase flow regime.
authors.affiliation: Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.initials: M
authors.lastname: Herskowitz
authors.initials: S
authors.lastname: Levitsky
authors.initials: I
authors.lastname: Shreiber