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http://dx.doi.org/10.3795/KSME-B.2015.39.7.549

Development and Validation of a Measurement Technique for Interfacial Velocity in Liquid-gas Separated Flow Using IR-PTV  

Kim, Sangeun (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Kim, Hyungdae (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.7, 2015 , pp. 549-555 More about this Journal
Abstract
A measurement technique of interfacial velocity in air-water separated flow by particle tracking velocimetry using an infrared camera (IR-PTV) was developed. As infrared light with wavelength in the range of 3-5 um could hardly penetrate water, IR-PTV can selectively visualize only the tracer particles existing in depths less than 20 um underneath the air-water interface. To validate the measurement accuracy of the IR-PTV technique, a measurement of the interfacial velocity of the air-water separated flow using Styrofoam particles floating in water was conducted. The interfacial velocity values obtained with the two different measurement techniques showed good agreement with errors less than 5%. It was found from the experimental results obtained using the developed technique that with increasing air velocity, the interfacial velocity proportionally increases, likely because of the increased interfacial stress.
Keywords
Interfacial Velocity; IR-PTV; Separated Flow;
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Times Cited By KSCI : 2  (Citation Analysis)
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