Thermo-acoustic wave propagation and reflection near the liquid-gas critical point

Details Thermo-acoustic wave propagation and reflection near the liquid-gas critical point Thermo-acoustic wave propagation and reflection near the liquid-gas critical point

2008-10-29

arxiv.org/abs/0810.5283v3

PHYSICAL REVIEW E 79, 060103(R) (2009)

Physics

Fluid Dynamics

14 pages, 4 figures, Accepted by PRE (Rapid Communication)

Scientific paper

10.1103/PhysRevE.79.060103

We study the thermo-acoustic wave propagation and reflection near the liquid-gas critical point. Specifically, we perform a numerical investigation of the acoustic responses in a near-critical fluid to thermal perturbations based on the same setup of a recent ultrasensitive interferometry measurement in CO2 [Y. Miura et al. Phys. Rev. E 74, 010101(R) (2006)]. The numerical results agree well with the experimental data. New features regarding the reflection pattern of thermo-acoustic waves near the critical point under pulse perturbations are revealed by the proper inclusion of the critically diverging bulk viscosity.

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