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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i4-6.190
pages 633-642

Investigation of Droplet Drying Characteristics Using an Acoustic-Aerodynamic Levitator

Günter Brenn
Institute of Fluid Mechanics and Heat Transfer, Graz University of Technology, 8010 Graz, Austria
Dirk Rensink
Institute of Chemical and Bioengineering, LSTM, University of Erlangen-Nurnberg, 91058 Erlangen, Germany
Cameron Tropea
Technische Universität Darmstadt, Institute of Fluid Mechanics and Aerodynamics, Center of Smart Interfaces, International Research Training Group Darmstadt-Tokyo on Mathematical Fluid Dynamics, Germany
Alexander L. Yarin
Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel

ABSTRAKT

The evaporation of liquid drops levitated in an acoustic-aerodynamic levitator is studied both theoretically and experimentally. The theoretical description takes the deformed drop shapes into account and is applicable for arbitrary ratios λ/2πα00 of sound wavelength to drop circumference. The experimental technique is based on the processing of video images to measure the evaporation rates of the levitated drops. Results consist mainly in the function d2 = f(t) of the squared volume-equivalent drop diameter, the drop shapes and the drop displacement from the pressure node as functions of time. The agreement between experiment and theory for small times is encouraging, the disagreement for larger times indicates liquid impurities which must be avoided in the future.


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