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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Acknowledgments
We would like to thank Rico Bartak for his help with experimental measurements. The numerical results of LCS in this paper were calculated using a Matlab package (http://dabiri.caltech.edu/software.html) developed by Professor John O. Dabiri at the California Institute of Technology. J S Allen, C Layman, and I M Sou acknowledge the support from NIH/NCRR-2 G12 RR0030161-21 and DHS. JS Allen also acknowledges support from NIH-EB006372. C Ray and I M Sou acknowledge the support from the University of Hawaii at Manoa research grant 382569.
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Sou, I.M., Allen, J.S., Layman, C.N. et al. A synchronized particle image velocimetry and infrared thermography technique applied to an acoustic streaming flow. Exp Fluids 51, 1201–1208 (2011). https://doi.org/10.1007/s00348-011-1141-z
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DOI: https://doi.org/10.1007/s00348-011-1141-z