Abstract
The objective of this study was to perturb vortex ring structures forming in the near field of a round air jet to modify the dispersion of solid particles in the flow. A jet with Reynolds number based on exit diameter of 1.9×10 4 was loaded with 55-μ diameter glass beads and forced axially with an acoustic speaker. Forcing waveforms were either single or double frequency. Results from flow visualization, laser Doppler anemometry, and quantitative mapping of particle number density show that significant modifications to local particle concentration and dispersion could be achieved
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