Acoustic Resonator Particle Separation 

Flow Visualization

      
Aerosol Particle Separation
The photo above contains measurements of the driving frequency, 
sound pressure, and velocity, and illustrates the particle alignment with
pressure nodes in the acoustic standing wave.

The photos and video clips below further illustrate the effects of 
the acoustic force on the aerosol particles in a moving gas stream.

Pointing up flow

Pointing down flow

Smooth reflecting wall, no microphone port

Video Clips

The pictures and video clips above were taken in the resonator without a microphone port. 
Piston is on the left-hand side.

Note position where velocity measurement was taken for exit flow:   

Real Player Video Clips