Sound and weak shock wave propagation in gas-liquid foams

I. Goldfarb, Z. Orenbakh, I. Shreiber, F. Vafina

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Propagation of sound and weak shock waves in gas-liquid foams is investigated theoretically and experimentally. An original physical model is developed to describe the evolution of small perturbations in a foam of polyhedral structure. The model developed takes into account both peculiarities of interface heat transfer in foam and liquid motion through the system of Plateau-Gibbs borders which results in the appearance of an additional hydrodynamic dissipative force. The Rayleigh equation analog, which takes into account the latter phenomenon, is obtained. Structure and dynamics of weak shock waves are investigated. A vertical shock tube was constructed and used to measure the parameters of weak shock wave propagation in gas-liquid foams of polyhedral structure. Spectral analysis of the data obtained shows that there are weak dispersion and strong dissipation of the initial signal. Comparison of the evolution of experimental and theoretical profiles permits to conclude that the suggested model allows to describe the peculiarities of acoustical perturbations in gas-liquid foam more precisely than it follows from the standard models.

Original languageEnglish
Pages (from-to)77-88
Number of pages12
JournalShock Waves
Issue number2
StatePublished - 1 Jan 1997
Externally publishedYes


  • Gas-liquid foam
  • Plateau-Gibbs borders
  • Sound waves
  • Weak shock waves

ASJC Scopus subject areas

  • Mechanical Engineering
  • General Physics and Astronomy


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