Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

Aliyu M. Aliyu, Almabrok A. Almabrok, Yahaya D. Baba, Liyun Lao, Hoi Yeung, Kyung Chun Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We present an experimental study on the flow behaviour of gas and liquid in the upward section of a vertical pipe system with an internal diameter of 101.6 mm and a serpentine geometry. The experimental matrix consists of superficial gas and liquid velocities in ranges of 0.15–30 m/s and from 0.07 to 1.5 m/s, respectively, which cover bubbly to annular flow. The effects on the flow behaviours downstream of the 180° return bend are significantly reduced when the flow reaches an axial distance of 47 pipe diameters from the U-bend. Therefore, reasonably developed flow is attained at this development length downstream of the bend. Other published measurements for large-diameter film thickness show similar trends with respect to the superficial gas velocity. However, the trends differ from those of small-diameter pipes, with which the film thickness decreases much faster with increasing gas flow. As a result, only a few of the published correlations for small pipe data agreed with the experimental data for large pipe film thickness. We therefore modified one of the best-performing correlations, which produced a better fit. Qualitative and statistical analyses show that the new correlation provides improved predictions for two-phase flow film thickness in large-diameter pipes.

Original languageEnglish
Pages (from-to)784-800
Number of pages17
JournalInternational Journal of Heat and Mass Transfer
Volume108
Early online date2 Jan 2017
DOIs
Publication statusPublished - 1 May 2017
Externally publishedYes

Fingerprint

U bends
two phase flow
Two phase flow
Pipe
Film thickness
film thickness
Gases
gases
annular flow
trends
Liquids
liquids
gas flow
Flow of gases
Geometry
matrices
geometry
predictions

Cite this

Aliyu, Aliyu M. ; Almabrok, Almabrok A. ; Baba, Yahaya D. ; Lao, Liyun ; Yeung, Hoi ; Kim, Kyung Chun. / Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe. In: International Journal of Heat and Mass Transfer. 2017 ; Vol. 108. pp. 784-800.
@article{ec2ac183655e4f55bb7836db598e6973,
title = "Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe",
abstract = "We present an experimental study on the flow behaviour of gas and liquid in the upward section of a vertical pipe system with an internal diameter of 101.6 mm and a serpentine geometry. The experimental matrix consists of superficial gas and liquid velocities in ranges of 0.15–30 m/s and from 0.07 to 1.5 m/s, respectively, which cover bubbly to annular flow. The effects on the flow behaviours downstream of the 180° return bend are significantly reduced when the flow reaches an axial distance of 47 pipe diameters from the U-bend. Therefore, reasonably developed flow is attained at this development length downstream of the bend. Other published measurements for large-diameter film thickness show similar trends with respect to the superficial gas velocity. However, the trends differ from those of small-diameter pipes, with which the film thickness decreases much faster with increasing gas flow. As a result, only a few of the published correlations for small pipe data agreed with the experimental data for large pipe film thickness. We therefore modified one of the best-performing correlations, which produced a better fit. Qualitative and statistical analyses show that the new correlation provides improved predictions for two-phase flow film thickness in large-diameter pipes.",
keywords = "Conductance film probes, Large diameter pipes, Multiphase flow, Return bends, Wire mesh sensor",
author = "Aliyu, {Aliyu M.} and Almabrok, {Almabrok A.} and Baba, {Yahaya D.} and Liyun Lao and Hoi Yeung and Kim, {Kyung Chun}",
year = "2017",
month = "5",
day = "1",
doi = "10.1016/j.ijheatmasstransfer.2016.12.069",
language = "English",
volume = "108",
pages = "784--800",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",

}

Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe. / Aliyu, Aliyu M.; Almabrok, Almabrok A.; Baba, Yahaya D.; Lao, Liyun; Yeung, Hoi; Kim, Kyung Chun.

In: International Journal of Heat and Mass Transfer, Vol. 108, 01.05.2017, p. 784-800.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Upward gas–liquid two-phase flow after a U-bend in a large-diameter serpentine pipe

AU - Aliyu, Aliyu M.

AU - Almabrok, Almabrok A.

AU - Baba, Yahaya D.

AU - Lao, Liyun

AU - Yeung, Hoi

AU - Kim, Kyung Chun

PY - 2017/5/1

Y1 - 2017/5/1

N2 - We present an experimental study on the flow behaviour of gas and liquid in the upward section of a vertical pipe system with an internal diameter of 101.6 mm and a serpentine geometry. The experimental matrix consists of superficial gas and liquid velocities in ranges of 0.15–30 m/s and from 0.07 to 1.5 m/s, respectively, which cover bubbly to annular flow. The effects on the flow behaviours downstream of the 180° return bend are significantly reduced when the flow reaches an axial distance of 47 pipe diameters from the U-bend. Therefore, reasonably developed flow is attained at this development length downstream of the bend. Other published measurements for large-diameter film thickness show similar trends with respect to the superficial gas velocity. However, the trends differ from those of small-diameter pipes, with which the film thickness decreases much faster with increasing gas flow. As a result, only a few of the published correlations for small pipe data agreed with the experimental data for large pipe film thickness. We therefore modified one of the best-performing correlations, which produced a better fit. Qualitative and statistical analyses show that the new correlation provides improved predictions for two-phase flow film thickness in large-diameter pipes.

AB - We present an experimental study on the flow behaviour of gas and liquid in the upward section of a vertical pipe system with an internal diameter of 101.6 mm and a serpentine geometry. The experimental matrix consists of superficial gas and liquid velocities in ranges of 0.15–30 m/s and from 0.07 to 1.5 m/s, respectively, which cover bubbly to annular flow. The effects on the flow behaviours downstream of the 180° return bend are significantly reduced when the flow reaches an axial distance of 47 pipe diameters from the U-bend. Therefore, reasonably developed flow is attained at this development length downstream of the bend. Other published measurements for large-diameter film thickness show similar trends with respect to the superficial gas velocity. However, the trends differ from those of small-diameter pipes, with which the film thickness decreases much faster with increasing gas flow. As a result, only a few of the published correlations for small pipe data agreed with the experimental data for large pipe film thickness. We therefore modified one of the best-performing correlations, which produced a better fit. Qualitative and statistical analyses show that the new correlation provides improved predictions for two-phase flow film thickness in large-diameter pipes.

KW - Conductance film probes

KW - Large diameter pipes

KW - Multiphase flow

KW - Return bends

KW - Wire mesh sensor

UR - http://www.scopus.com/inward/record.url?scp=85007569647&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2016.12.069

DO - 10.1016/j.ijheatmasstransfer.2016.12.069

M3 - Article

AN - SCOPUS:85007569647

VL - 108

SP - 784

EP - 800

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -