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Turbulence Enhancement by Ultrasonically Induced Gaseous Cavitation in the $CO_2$Saturated Water  

Lee, Seung-Youp (Graduate School, Korea University)
Park, Young-Don (Department of Mechanical Engineering, Korea University)
Publication Information
Journal of Mechanical Science and Technology / v.16, no.2, 2002 , pp. 246-254 More about this Journal
Abstract
Recent primary concern for the design of high performance heat exchanger and highly integrated electronic equipments is to develop an active and creative technologies which enhance the heat transfer without obstructing the coolant flows. In this study, we found through the LDV measurement that the gaseous cavitation induced by ultrasonic vibration applied to the CO$_2$saturated water in the square cross-sectioned straight duct flow enhances the turbulence much more than the case of non-ultrasonic or normal ultrasonic conditions without gaseous cavitation does. We also found that gaseous cavitation can enhance effectively the turbulent heat transfer between the heating surfaces and coolants by destructing the viscous sublayer.
Keywords
Ultrasonic Vibration; Gaseous Cavitation; Viscous Sublayer; LDV; Square Cross-sectioned Duct;
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Times Cited By KSCI : 1  (Citation Analysis)
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