open access

https://hdl.handle.net/2115/14905

Turbulent acoustic streaming excited by resonant gas oscillation with periodic shock waves in a closed tube

英語

1999-07

American Institute of Physics (The Acoustical Society of America)

The Journal of the Acoustical Society of America

106(1)

L7-L12

Resonant gas oscillations with periodic shock waves in a closed tube are studied by executing large-scale computations of the compressible 2-D Navier–Stokes equations with a finite-difference method. In a quasisteady state of oscillation, acoustic streaming (mean mass flow) of large Rs is excited, where Rs is the streaming Reynolds number based on a characteristic streaming velocity, the tube length, and the kinematic viscosity. When Rs=560, relatively strong vortices are localized near the tube wall. The resulting streaming pattern is almost stationary but quite different from that of the Rayleigh streaming. The streaming of Rs=6200 involves unsteady vortices in a region near the center of the tube. Turbulent streaming appears in the result of Rs=56000, where vortices of various scales are irregularly generated throughout the tube. ©1999 Acoustical Society of America.

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Copyright 1999, Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

0001-4966