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Related Experiment Videos

Thermal effects on acoustic streaming in standing waves.

Mark F Hamilton1, Yurii A Ilinskii, Evgenia A Zabolotskaya

  • 1Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712-1063, USA.

The Journal of the Acoustical Society of America
|January 13, 2004
PubMed
Summary

This study analyzes acoustic streaming in gas-filled channels, considering heat conduction and temperature-dependent viscosity. Thermal effects are minimal in very wide or narrow channels but significant in intermediate widths.

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Area of Science:

  • Acoustics
  • Fluid Dynamics
  • Thermodynamics

Background:

  • Previous work analyzed acoustic streaming in purely viscous fluids.
  • This study extends the analysis to gases, incorporating thermal effects.

Purpose of the Study:

  • To analytically investigate acoustic streaming in channels of arbitrary width.
  • To account for heat conduction and temperature-dependent viscosity in gases.

Main Methods:

  • Analytical investigation of acoustic streaming.
  • Inclusion of thermal conductivity and temperature-dependent viscosity.
  • Calculations for gases used in thermoacoustic engines.

Main Results:

  • Thermal effects are small in very wide (Rayleigh streaming regime) and very narrow channels.

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  • Heat conduction significantly impacts acoustic streaming in intermediate-width channels (10-20 times viscous penetration depth).
  • Results for 2D channels and cylindrical tubes are qualitatively similar.

    • Conclusions:

    • Heat conduction plays a substantial role in acoustic streaming within intermediate-width channels.
    • The findings are relevant for understanding thermoacoustic engines and fluid dynamics in confined geometries.