J. Phys. IV France 02 (1992) C1-891-C1-894
INVESTIGATION OF SOUND WAVES PROPAGATION PECULIARITIES IN GAS-LIQUID FOAMI.I. GOLDFARB1, Z.M. ORENBAKH1, G.A. SHUSHKOV1, I.R. SHREIBER2 and F.I. VAFINA1
1 Institute of Northern Development, Siberian Branch USSR Academy of Sciences, 625003 Tyumen 3, P.O. Box 2774, USSR
2 Ofakim Center of Technology, Ofakim 80300, P.O. Box 633, Israel
Both theoretical and experimental results of sound waves propagation peculiarities investigation in gas-liquid foams are presented in the paper. It is shown that the results of the experiments on studying weak shock waves in the gas-liquid foam can not be satisfactorily described by the standard model of sound propagation in two-phase media. To explain the obtained experimental data the authors suggest the model considering the peculiarities of the foam structure and the presence of additional hydrodynamic mechanism, influencing the signal evolution in foam - liquid motion along the system of the Plateau-Gibbs channels. The data of the experimental and calculated profiles analysis are evidence of the fact that the suggested model describes the real acoustical properties of gas-liquid foams more precisely than certain models for the two-phase mixtures with small gas content.
© EDP Sciences 1992