Flow physics of upward cocurrent gas-liquid annular flow in a vertical small diameter tube

  • Huawei Han
  • Kamiel Gabriel


In this paper, a steady RNG k-ε model, in conjunction with enhanced wall treatment method, was applied to the gas core in order to simulate the flow physics of annular two-phase flow. The model incorporated a physical model of wave characteristics and included the liquid entrainment influence on the flow. Based on the simulation results, flow features in the gas core were quantitatively presented and a model of the liquid entrainment mechanism was proposed. In addition, a parametric study was conducted to determine the impact of changing wave velocity, pressure, and gravitational force on the liquid film flow. The results were validated using a large set of experimental data at normal and microgravity conditions. Also, the law of the wall was applied to previously-collected experimental data. Analysis yielded different flow features of the liquid film at microgravity and normal gravity conditions.


Mass Flow Rate Liquid Film Interfacial Shear Stress Annular Flow Liquid Film Thickness 
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Copyright information

© Z-Tec Publishing 2006

Authors and Affiliations

  1. 1.Research & Graduate ProgramsUniversity of Ontario Institute of TechnologyOshawaCanada

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