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

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.

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Correspondence to O. N. Kashinsky.

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Kashinsky, O.N., Lobanov, P.D. & Randin, V.V. The influence of a small gas addition to the structure of gas-liquid downward flow in a tube. J. Engin. Thermophys. 17, 120 (2008). https://doi.org/10.1134/S1810232808020033

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Keywords

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