The influence of a small gas addition to the structure of gas-liquid downward flow in a tube

Article

Abstract

A study of the local structure of the turbulent gas-liquid bubble flow in a tube with an inner diameter of 20 mm was performed by using the electrodiffusion method. A special feature of this research is the relatively small (up to 5% of the volume) quantities of gas added to the flow. To determine the radial distribution of the liquid velocity, its pulsations, and the local void fraction, we used a sensor of the blunt nose type, which simultaneously functioned as an electrochemical sensor and a conductivity sensor. It was shown that adding even small quantities of gas into the flow leads to a change in the liquid velocity profile in comparison with the single phase flow and rearrangement of the turbulent structure of the flow.

Keywords

Wall Shear Stress Direct Numerical Simulation Void Fraction Bubble Size Liquid Velocity 

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Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • O. N. Kashinsky
    • 1
  • P. D. Lobanov
    • 1
  • V. V. Randin
    • 1
  1. 1.Kutateladze Institute of ThermophysicsSiberian Branch of the Russian Academy of SciencesNovosibirskRussia

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