### Abstract

The effect of pipe length-to-diameter ratio (L/D) on air-water two phase slug flow regime development is hereby investigated. Axial velocity along the leading Taylor bubble and hydrodynamic entrance length required to establish a fully developed parabolic profile were critically assessed. The eccentricity distribution of axial velocity on leading Taylor bubble stream and on its nose is observed

in all the L/D geometry ratios. The radial component of the axial velocity profile in the liquid film ahead of the leading Taylor bubble is represented by a power law function; with exponent n=6.1 for L/D=833.3 and n=5.7 for L/D=1666.7. Despite a decrease in the exponent as L/D ratio increases, the full parabolic profile could not be reached. This suggests that further investigation on L/D

ratio incorporating other inherent variables which are likely to affect the development of the full parabolic profile may be required.

in all the L/D geometry ratios. The radial component of the axial velocity profile in the liquid film ahead of the leading Taylor bubble is represented by a power law function; with exponent n=6.1 for L/D=833.3 and n=5.7 for L/D=1666.7. Despite a decrease in the exponent as L/D ratio increases, the full parabolic profile could not be reached. This suggests that further investigation on L/D

ratio incorporating other inherent variables which are likely to affect the development of the full parabolic profile may be required.

Original language | English |
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Article number | 00003 |

Pages (from-to) | 1-7 |

Number of pages | 7 |

Journal | Journal of Oil, Gas and Petrochemical Sciences |

Volume | 1 |

Issue number | 1 |

Publication status | Published - 19 Dec 2017 |

## Fingerprint Dive into the research topics of 'Effect of length-to-diameter ratio on axial velocity and hydrodynamic entrance length in air-water two-phase flow in vertical pipes'. Together they form a unique fingerprint.

## Profiles

### Lateef Akanji

- Engineering, Engineering - Senior Lecturer
- Centre for Energy Transition
- Engineering (Research Theme)

Person: Staff, Academic

## Cite this

Chidamoio, J. F., Akanji, L., & Rafati, R. (2017). Effect of length-to-diameter ratio on axial velocity and hydrodynamic entrance length in air-water two-phase flow in vertical pipes.

*Journal of Oil, Gas and Petrochemical Sciences*,*1*(1), 1-7. [00003]. http://ologyjournals.com/jogps/volume_issues?issueId=7&volumeId=5