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Nonlinear effects and shock formation in the focusing of a spherical acoustic wave

Author

Listed:
  • C. Appert
  • C. Tenaud
  • X. Chavanne
  • S. Balibar
  • F. Caupin
  • D. d’Humiéres

Abstract

The focusing of acoustic waves is used to study nucleation phenomena in liquids. At large amplitude, nonlinear effects are important so that the magnitude of pressure or density oscillations is difficult to predict. We present a calculation of these oscillations in a spherical geometry. We show that the main source of nonlinearities is the shape of the equation of state of the liquid, enhanced by the spherical geometry. We also show that the formation of shocks cannot be ignored beyond a certain oscillation amplitude. The shock length is estimated by an analytic calculation based on the characteristics method. In our numerical simulations, we have treated the shocks with a WENO scheme. We obtain a very good agreement with experimental measurements which were recently performed in liquid helium. In addition, the comparison between numerical and experimental results allows us to calibrate the vibration of the ceramic used to produce the wave, as a function of the applied voltage. Copyright Springer-Verlag Berlin/Heidelberg 2003

Suggested Citation

  • C. Appert & C. Tenaud & X. Chavanne & S. Balibar & F. Caupin & D. d’Humiéres, 2003. "Nonlinear effects and shock formation in the focusing of a spherical acoustic wave," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 35(4), pages 531-549, October.
    • Handle: RePEc:spr:eurphb:v:35:y:2003:i:4:p:531-549
    DOI: 10.1140/epjb/e2003-00307-0
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