Thermoacoustic waves along the critical isochore

Biao Shen, P. Zhang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Near the liquid-gas critical point, thermal disturbances can generate sounds. We study the acoustic emission over four decades of reduced temperatures [defined as ε=(T-Tc)/Tc, with Tc the critical temperature] along the critical isochore, under linear and nonlinear temperature perturbations, respectively. We identify various thermoacoustic behaviors by numerically solving the governing equations. It is shown that a homogeneous thermoacoustic-wave pattern dominates in the linear case, largely independent of ε; whereas under the nonlinear perturbation, variation in ε could lead to severe wavefront deformation. The strong nonlinear effect is found to be of a transient nature because, in due time, both cases tend to converge in terms of the energy yield of the adiabatic process.

Original languageEnglish
Article number011115
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume83
Issue number1
DOIs
Publication statusPublished - Jan 21 2011

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perturbation
Acoustic Emission
Nonlinear Perturbations
acoustic emission
Nonlinear Effects
Critical Temperature
Wave Front
Governing equation
Critical point
critical point
critical temperature
disturbances
Disturbance
Liquid
Tend
Perturbation
Converge
temperature
acoustics
liquids

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this

Thermoacoustic waves along the critical isochore. / Shen, Biao; Zhang, P.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 83, No. 1, 011115, 21.01.2011.

Research output: Contribution to journalArticle

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