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Updated: May 4, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
Published on: March 12, 2019
A synchronized particle image velocimetry and infrared thermography technique applied to an acoustic streaming flow
In Mei Sou1, John S Allen2, Christopher N Layman2
1Department of Civil and Environmental Engineering, University of Hawaii at Manoa, Honolulu, HI 96822, USA.
Abstract:
Subsurface coherent structures and surface temperatures are investigated using simultaneous measurements of particle image velocimetry (PIV) and infrared (IR) thermography. Results for coherent structures from acoustic streaming and associated heating transfer in a rectangular tank with an acoustic horn mounted horizontally at the sidewall are presented. An observed vortex pair develops and propagates in the direction along the centerline of the horn. From the PIV velocity field data, distinct kinematic regions are found with the Lagrangian coherent structure (LCS) method. The implications of this analysis with respect to heat transfer and related sonochemical applications are discussed.
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