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Abstract <p>The structure of an upward bubbly flow in an inclined circular tube is experimentally studied. Local void fraction profiles are obtained using a point conductivity sensor. Wall shear stress is determined using the electrochemical method. Evidently, the tube orientation greatly affects the local characteristics of a gas-liquid flow. Gas phase concentration significantly increases in the upper part of the inclined tube, leading to an increment of maximum values of local void fraction near the wall and to an increase in wall shear stress as compared to a single-phase flow. The most significant increase in friction occurs at inclination angles from 40° to 60°.</p>

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Effect of the Inclination Angle on Local Characteristics of an Upward Gas-Liquid Flow in a Circular Tube

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. E. Gorelikova,
  • O. N. Kashinskii,
  • A. S. Kurdyumov

摘要

Abstract

The structure of an upward bubbly flow in an inclined circular tube is experimentally studied. Local void fraction profiles are obtained using a point conductivity sensor. Wall shear stress is determined using the electrochemical method. Evidently, the tube orientation greatly affects the local characteristics of a gas-liquid flow. Gas phase concentration significantly increases in the upper part of the inclined tube, leading to an increment of maximum values of local void fraction near the wall and to an increase in wall shear stress as compared to a single-phase flow. The most significant increase in friction occurs at inclination angles from 40° to 60°.