Order of Magnitude of Acoustic Streaming Velocities
Even if viscosity is responsible for acoustic streaming, the value of viscosity disappears from the resulting streaming velocities.
The order of magnitude of streaming velocities are
- near a boundary (outside of the boundary layer):
with the sound vibration velocity and along the wall boundary. The flow is directed towards decreasing sound vibrations (vibration nodes).
- near a vibrating bubble of rest radius a, whose radius pulsates with relative amplitude (or ), and whose center of mass also periodically translates with relative amplitude (or ). with a phase shift
Read more about this topic: Acoustic Streaming
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