Multi-Phase Flow

This refers to a state of low where there are multiple phases of fluids flowing together in one stream. Multi-phase systems have variations in the flow regimes along the fluid stream and typically there are 4 regimes that have been identified:

  • Bubble – the gas phase is dispersed within the continuous liquid phase
  • Slug – gas bubble coalesce into a large enough volume that it occupies the diameter of the pipe
  • Churn – the bubbles become large enough such that they collapse promoting turbulent flow with both phases being dispersed
  • Annular – gas becomes the continuous phase with the liquid phase entrained within
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