Prediction of Optimum Length to Diameter Ratio for Two-Phase Fluid Flow Development in Vertical Pipes

Joao Chidamoio, Lateef Akanji, Roozbeh Rafati

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Abstract

We investigate, via numerical simulation technique, the effect of length-to-diameter ratio on transient air-water two-phase flow in vertically upward cylindrical pipe geometry for parameterisation of the pilot scale laboratory multiphase flow rig. Variables such as axial velocity along the leading Taylor bubble, Taylor bubble length and Taylor bubble velocity are considered. A hydrodynamic entrance length required to establish a fully developed two phase flow was critically evaluated. Aperiodic behaviour on time and space dictates the complexity of continuous and unstable gas liquid flow. The porous injection configuration produced small bubble sizes compared to a single gas injection configuration even at higher gas injection rates.
Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalAdvances in Petroleum Exploration and Development
Volume14
Issue number1
DOIs
Publication statusPublished - 30 Oct 2017

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Two phase flow
Flow of fluids
Pipe
Multiphase flow
Parameterization
Bubbles (in fluids)
Hydrodynamics
Geometry
Computer simulation
Liquids
Air
Gases
Water

Keywords

  • computer aided design
  • finite elements
  • Hydrodynamic entrance length
  • Taylor bubble

Cite this

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abstract = "We investigate, via numerical simulation technique, the effect of length-to-diameter ratio on transient air-water two-phase flow in vertically upward cylindrical pipe geometry for parameterisation of the pilot scale laboratory multiphase flow rig. Variables such as axial velocity along the leading Taylor bubble, Taylor bubble length and Taylor bubble velocity are considered. A hydrodynamic entrance length required to establish a fully developed two phase flow was critically evaluated. Aperiodic behaviour on time and space dictates the complexity of continuous and unstable gas liquid flow. The porous injection configuration produced small bubble sizes compared to a single gas injection configuration even at higher gas injection rates.",
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