8 April 1988 Gas<->Liquid Transport By Acoustic Levitation Of Single Drops In A Horizontal Wind Tunnel
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Proceedings Volume 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation; (1988) https://doi.org/10.1117/12.943873
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States
Abstract
We have built what we believe is the first instrument which acoustically levitates liquid drops surrounded by a continuously flowing gas stream. Drops 0.2 to 2.0mm in diameter have been levitated for periods of time up to hours in the working section of a horizontal wind tunnel. Air speeds of 25-300 cm/sec, corresponding to Reynolds numbers from 3 to 250, do not blow the drop out of the trap. Evaporation data from neat liquids indicate that the sound field has negligible effect on drop evaporation. We have observed phase separation in the evaporation of two partially miscible liquids. We have also seen evaporation stopped by the formation of a surface monolayer. Laser fluorescence from room temperature solutions is being investigated as a means of monitoring the transport of trace species between the gas and liquid phases.
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Mark Seaver, Mark Seaver, } "Gas<->Liquid Transport By Acoustic Levitation Of Single Drops In A Horizontal Wind Tunnel", Proc. SPIE 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation, (8 April 1988); doi: 10.1117/12.943873; https://doi.org/10.1117/12.943873
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