Performance of a drag-reducing polymer in horizontal and downward-inclined oil-water flow

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, the influence of a drag-reducing polymer on oil-water flow patterns and pressure gradients was investigated in a downward-inclined pipe (-5°) and compared with the results obtained in a horizontal pipe for the same flow characteristics. Drag reduction was achieved by adding 40. ppm of polymer into an oil-water flow in an acrylic pipe of 0.0306. m ID flowing at 0.1-1.6. m/s mixture velocities and 0.05-0.9 input oil volume fractions. The downward inclination enhanced the mixing of the two phases and hence the boundaries between the dispersed and separated flows occurred at lower mixture velocities in downward flow than in horizontal flow. In both pipe orientations, the addition of the DRP affects the flow patterns and pressure gradients mainly in the water-dominated flow regions. Compared with those of the horizontal flow, the effect of polymer addition on flow pattern boundaries was generally lower at -5° inclination. The effect of the polymer on the pressure gradients was more pronounced at horizontal flow than at -5° flow, resulting in a maximum drag reduction of 64% and 55% at horizontal and -5° flows, respectively. Since the polymer used is water-soluble, there were no observable changes in the flow characteristics at the oil-dominated flow regions.

Original languageEnglish
Pages (from-to)237-246
Number of pages10
JournalChemical Engineering Research and Design
Volume104
DOIs
Publication statusPublished - 2015

Fingerprint

Drag
Polymers
Oils
Pressure gradient
Pipe
Water
Flow patterns
Drag reduction
Acrylics
Volume fraction

Keywords

  • Drag reduction
  • Flow pattern
  • Inclination angle
  • Oil-water
  • Pressure gradient

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

@article{2e7ebf60476141fea5dd669a455e0f8a,
title = "Performance of a drag-reducing polymer in horizontal and downward-inclined oil-water flow",
abstract = "In this study, the influence of a drag-reducing polymer on oil-water flow patterns and pressure gradients was investigated in a downward-inclined pipe (-5°) and compared with the results obtained in a horizontal pipe for the same flow characteristics. Drag reduction was achieved by adding 40. ppm of polymer into an oil-water flow in an acrylic pipe of 0.0306. m ID flowing at 0.1-1.6. m/s mixture velocities and 0.05-0.9 input oil volume fractions. The downward inclination enhanced the mixing of the two phases and hence the boundaries between the dispersed and separated flows occurred at lower mixture velocities in downward flow than in horizontal flow. In both pipe orientations, the addition of the DRP affects the flow patterns and pressure gradients mainly in the water-dominated flow regions. Compared with those of the horizontal flow, the effect of polymer addition on flow pattern boundaries was generally lower at -5° inclination. The effect of the polymer on the pressure gradients was more pronounced at horizontal flow than at -5° flow, resulting in a maximum drag reduction of 64{\%} and 55{\%} at horizontal and -5° flows, respectively. Since the polymer used is water-soluble, there were no observable changes in the flow characteristics at the oil-dominated flow regions.",
keywords = "Drag reduction, Flow pattern, Inclination angle, Oil-water, Pressure gradient",
author = "A. Abubakar and Al-Hashmi, {A. R.} and T. Al-Wahaibi and Y. Al-Wahaibi and A. Al-Ajmi and M. Eshrati",
year = "2015",
doi = "10.1016/j.cherd.2015.08.010",
language = "English",
volume = "104",
pages = "237--246",
journal = "Chemical Engineering Research and Design",
issn = "0263-8762",
publisher = "Institution of Chemical Engineers",

}

TY - JOUR

T1 - Performance of a drag-reducing polymer in horizontal and downward-inclined oil-water flow

AU - Abubakar, A.

AU - Al-Hashmi, A. R.

AU - Al-Wahaibi, T.

AU - Al-Wahaibi, Y.

AU - Al-Ajmi, A.

AU - Eshrati, M.

PY - 2015

Y1 - 2015

N2 - In this study, the influence of a drag-reducing polymer on oil-water flow patterns and pressure gradients was investigated in a downward-inclined pipe (-5°) and compared with the results obtained in a horizontal pipe for the same flow characteristics. Drag reduction was achieved by adding 40. ppm of polymer into an oil-water flow in an acrylic pipe of 0.0306. m ID flowing at 0.1-1.6. m/s mixture velocities and 0.05-0.9 input oil volume fractions. The downward inclination enhanced the mixing of the two phases and hence the boundaries between the dispersed and separated flows occurred at lower mixture velocities in downward flow than in horizontal flow. In both pipe orientations, the addition of the DRP affects the flow patterns and pressure gradients mainly in the water-dominated flow regions. Compared with those of the horizontal flow, the effect of polymer addition on flow pattern boundaries was generally lower at -5° inclination. The effect of the polymer on the pressure gradients was more pronounced at horizontal flow than at -5° flow, resulting in a maximum drag reduction of 64% and 55% at horizontal and -5° flows, respectively. Since the polymer used is water-soluble, there were no observable changes in the flow characteristics at the oil-dominated flow regions.

AB - In this study, the influence of a drag-reducing polymer on oil-water flow patterns and pressure gradients was investigated in a downward-inclined pipe (-5°) and compared with the results obtained in a horizontal pipe for the same flow characteristics. Drag reduction was achieved by adding 40. ppm of polymer into an oil-water flow in an acrylic pipe of 0.0306. m ID flowing at 0.1-1.6. m/s mixture velocities and 0.05-0.9 input oil volume fractions. The downward inclination enhanced the mixing of the two phases and hence the boundaries between the dispersed and separated flows occurred at lower mixture velocities in downward flow than in horizontal flow. In both pipe orientations, the addition of the DRP affects the flow patterns and pressure gradients mainly in the water-dominated flow regions. Compared with those of the horizontal flow, the effect of polymer addition on flow pattern boundaries was generally lower at -5° inclination. The effect of the polymer on the pressure gradients was more pronounced at horizontal flow than at -5° flow, resulting in a maximum drag reduction of 64% and 55% at horizontal and -5° flows, respectively. Since the polymer used is water-soluble, there were no observable changes in the flow characteristics at the oil-dominated flow regions.

KW - Drag reduction

KW - Flow pattern

KW - Inclination angle

KW - Oil-water

KW - Pressure gradient

UR - http://www.scopus.com/inward/record.url?scp=84955109040&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84955109040&partnerID=8YFLogxK

U2 - 10.1016/j.cherd.2015.08.010

DO - 10.1016/j.cherd.2015.08.010

M3 - Article

VL - 104

SP - 237

EP - 246

JO - Chemical Engineering Research and Design

JF - Chemical Engineering Research and Design

SN - 0263-8762

ER -