Faiza Saidj
Experimental investigation of air–water two-phase flow through vertical 90° bend
Saidj, Faiza; Kibboua, Rachid; Azzi, Abdelwahid; Ababou, Noureddine; Azzopardi, Barry J.
Authors
Rachid Kibboua
Abdelwahid Azzi
Noureddine Ababou
Barry J. Azzopardi
Abstract
The behaviour of two-phase air–water mixture flowing from the horizontal to the vertical through a 90° bend has been investigated experimentally. Cross sectional void fraction at nine positions, three upstream and six downstream of the bend have been measured using a conductance probe technique. The bend, manufactured from transparent acrylic resin has a diameter of 34 mm and a curvature (R/D) equal to 5. The superficial velocity of the air was varied between 0.3 and 4 m/s and that for the water between 0.21 and 0.91 m/s. The characteristics signatures of Probability Density Function (PDF), the Power Spectral Density (PSD) of the time series of cross sectionally average void fraction and visual observations have been used to characterise the flow behaviour. For the experimental conditions, plug, slug and stratified wavy flow pattern occurred in the horizontal pipe while slug and churn flow patterns were present in the vertical pipe. The void fraction increased with the gas superficial velocity. The correlation of Nicklin et al. predicted the structure velocity for the slug flow in both horizontal and vertical pipes reasonably accurately. With regards to the frequency of the periodic structures present, some conditions showed little change from upstream to downstream the bend whilst others showed an increasing in the structure frequency from horizontal to vertical pipe. The slug length increased by passing through the vertical bend.
Citation
Saidj, F., Kibboua, R., Azzi, A., Ababou, N., & Azzopardi, B. J. (2014). Experimental investigation of air–water two-phase flow through vertical 90° bend. Experimental Thermal and Fluid Science, 57, https://doi.org/10.1016/j.expthermflusci.2014.04.020
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 25, 2014 |
Online Publication Date | May 9, 2014 |
Publication Date | Sep 3, 2014 |
Deposit Date | Jul 29, 2016 |
Publicly Available Date | Jul 29, 2016 |
Journal | Experimental Thermal and Fluid Science |
Print ISSN | 0894-1777 |
Electronic ISSN | 0894-1777 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 57 |
DOI | https://doi.org/10.1016/j.expthermflusci.2014.04.020 |
Keywords | 90° Bend; Two-phase flow; Void fraction; Air–water; Conductance probe; Flow pattern |
Public URL | https://nottingham-repository.worktribe.com/output/737085 |
Publisher URL | http://www.sciencedirect.com/science/article/pii/S0894177714001174 |
Contract Date | Jul 29, 2016 |
Files
Experimental investigation of air-water two-phase flow through vertical 90 bend.pdf
(866 Kb)
PDF
Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2025
Advanced Search