Mixing Phenomena in a Liquid Bath Stirred by GasJets through Side and Inclined Nozzles

Sergey Victorovich Komarov, Kenji Itoh, Masamichi Sano, Konstantin A. Bliimov

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The perfect mixing time, tm, of the water bath, during gas injection through bottom (vertical and iclined) and side nozzles has been measured by using electrical conductivity technique. Effects of gas flow rate, bath depth, nozzle angle and location have been examined. The measurements indicate that under the condition of a shallow bath {H/D = 0.31) and large gas flow rate (specific power ε> 10-1 W/kg) influences of the nozzle angle and nozzle location on the mixing time are significant. On the other hand, effects of those parameters on tm are negligible in a deep bath (A//D = 1.25). Change in the tracer concentration with time was predicted by numerical modelling. A satisfactory agreement between the computed and experimental results can be obtained by parameter fitting for the average plume rise velocity and effective viscosity in the mathematical model. It is presumed that turbulent mass transfer of the tracer is dominant in the deep bath, while the convection of liquid is more effective in the homogenization in the shallow bath.

Original languageEnglish
Pages (from-to)740-747
Number of pages8
JournalIsij International
Volume33
Issue number7
DOIs
Publication statusPublished - 1993 Jan 1
Externally publishedYes

Keywords

  • cold model
  • convection
  • numerical modelling
  • perfect mixing time
  • side and inclined injection
  • turbulent mass transfer

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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