Sound propagation in reacting systems

Sound propagation in colloidal systems

We study the propagation of sound in complex colloidal systems. By combining Biillouin scattering with ultrasonic techniques, we measure the dispersion in the acoustic propagation over three decades in frequency. Acoustic propagation is sensitive to the bulk compressibility of the medium, and probes new structural and dynamic properties of the colloidal system. We study two colloidal systems. T...

Contributions to the Theory of Sound Propagation in Ducts with Bulk-reacting Lining

(Received 26 February 1984; accepted for publication 20 November 1984) A theoretical nalysis ofsound propagation in cylindrical ducts lined with porous material {bulk absorbers) is presented. Three configurations are discussed. (1) The porous material is homogeneous; thenthe sound field is built up of modes. (2) The properties of the liner vary slowly in an axial direction. A pure modal solutio...

An improved multimodal method for sound propagation in ducts lined with bulk reacting linings

Over the years, the sound attenuation provided by ducts with bulk reacting lining has been widely investigated in the literature. Numerous models exist. Each of them presents assets and limitations according to the geometry of the studied problem. For a complete review of the methods, we refer to the recent articles of Kirby [7] and Panigrahi et al. [12] and the references therein. The methods ...

DYNAMICAL SIMULATION OF UNDERWATER SOUND PROPAGATION IN THE HORMOZ STRAIT

Providing an illustration of sound propagation in the Hormoz Strait ,this paper is about acoustic wave propagation in shallow water for a harmonic point source with low frequency, less than 1000 and solution of a homogenous Helmholtz equation using parabolic equation. C++ programming is used to solve Helmholtz equation [9] and MATLAB software is used to illustrate figures and animate them [6], ...

Equilibrium in Multiphase Reacting Systems