Turbulence generation by ultrasonically induced gaseous cavitation in the CO2 saturated water flow

Seung Youp Lee, Young Don Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Emission of ultrasonic vibration to turbulent flow promotes the turbulence generation due to the resonantly oscillating pressure field and thereby induced cavitation. In addition, ultrasonic vibration is well transmitted through water and not dissipated easily so that the micro-bubbles involved in the fluid induce the gaseous cavitation if the bubbles are resonated with the ultrasonic field. In the present study, we found through LDV measurement that the gaseous cavitation induced by ultrasonic vibration to CO2 saturated water flow in the rectangular cross-sectioned straight duct enhances turbulence much more than the case of non-ultrasonic or normal ultrasonic conditions without gaseous cavitation. We also found that the fluctuating velocity component induced by emitting the ultrasonic vibration in normal direction of a rectangular channel flow can be redistributed to stream-wise component by the agitation of gaseous cavitation.

Original languageEnglish
Pages (from-to)1203-1210
Number of pages8
JournalKSME International Journal
Volume17
Issue number8
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Co saturated water
  • Gaseous cavitation
  • LDV
  • Rectangular cross-sectioned duct
  • Ultrasonic vibration

ASJC Scopus subject areas

  • Mechanical Engineering

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