Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?

Understanding the behaviour of gas–liquid flows in upward and downward pipe configurations in chemical, petroleum, and nuclear industries is vital when optimal design, operation, production, and safety are of paramount concern. Unfortunately, the information concerning the behaviour of such flows in...

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Autores principales:	Mukhtar Abdulkadir, Olumayowa T. Kajero, Fawziyah O. Olarinoye, Dickson O. Udebhulu, Donglin Zhao, Aliyu M. Aliyu, Abdelsalam Al-Sarkhi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	air–water system downward flow upward flow large-diameter liquid fraction conductance ring probes Technology T
Acceso en línea:	https://doaj.org/article/5a17e1c465f5424b8393b2f2f0180a5c
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spelling	oai:doaj.org-article:5a17e1c465f5424b8393b2f2f0180a5c2021-11-11T15:52:36ZInvestigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?10.3390/en142170711996-1073https://doaj.org/article/5a17e1c465f5424b8393b2f2f0180a5c2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7071https://doaj.org/toc/1996-1073Understanding the behaviour of gas–liquid flows in upward and downward pipe configurations in chemical, petroleum, and nuclear industries is vital when optimal design, operation, production, and safety are of paramount concern. Unfortunately, the information concerning the behaviour of such flows in large pipe diameters is rare. This article aims to bridge that gap by reporting air–water upward and downward flows in 127 mm internal diameter pipes using advanced conductance ring probes located at two measurement locations. The liquid and gas flow rates are 0.021 to 0.33 m/s and 3.52 to 16.1 m/s, correspondingly, covering churn and annular flows. To achieve the desired objectives, several parameters, probability density function (PDF), power spectral density (PSD), Slippage Number (<i>S<sub>N</sub></i>), drift velocity (<i>U<sub>gd</sub></i>), and distribution coefficient (<i>C</i><sub>0</sub>) were employed. The flow regimes encountered in the two pipe configurations were distinguished employing a flow regime map available in the literature and statistical analysis. The obtained results were supported by visual inspection. The comparison between the present study against reported studies reveals the same tendency for the measured experimental data. The Root Mean Square Error (RMSE) method within 4% was utilized in recommending the best void fraction prediction correlation for the downward and upward flows.Mukhtar AbdulkadirOlumayowa T. KajeroFawziyah O. OlarinoyeDickson O. UdebhuluDonglin ZhaoAliyu M. AliyuAbdelsalam Al-SarkhiMDPI AGarticleair–water systemdownward flowupward flowlarge-diameterliquid fractionconductance ring probesTechnologyTENEnergies, Vol 14, Iss 7071, p 7071 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	air–water system downward flow upward flow large-diameter liquid fraction conductance ring probes Technology T
spellingShingle	air–water system downward flow upward flow large-diameter liquid fraction conductance ring probes Technology T Mukhtar Abdulkadir Olumayowa T. Kajero Fawziyah O. Olarinoye Dickson O. Udebhulu Donglin Zhao Aliyu M. Aliyu Abdelsalam Al-Sarkhi Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
description	Understanding the behaviour of gas–liquid flows in upward and downward pipe configurations in chemical, petroleum, and nuclear industries is vital when optimal design, operation, production, and safety are of paramount concern. Unfortunately, the information concerning the behaviour of such flows in large pipe diameters is rare. This article aims to bridge that gap by reporting air–water upward and downward flows in 127 mm internal diameter pipes using advanced conductance ring probes located at two measurement locations. The liquid and gas flow rates are 0.021 to 0.33 m/s and 3.52 to 16.1 m/s, correspondingly, covering churn and annular flows. To achieve the desired objectives, several parameters, probability density function (PDF), power spectral density (PSD), Slippage Number (<i>S<sub>N</sub></i>), drift velocity (<i>U<sub>gd</sub></i>), and distribution coefficient (<i>C</i><sub>0</sub>) were employed. The flow regimes encountered in the two pipe configurations were distinguished employing a flow regime map available in the literature and statistical analysis. The obtained results were supported by visual inspection. The comparison between the present study against reported studies reveals the same tendency for the measured experimental data. The Root Mean Square Error (RMSE) method within 4% was utilized in recommending the best void fraction prediction correlation for the downward and upward flows.
format	article
author	Mukhtar Abdulkadir Olumayowa T. Kajero Fawziyah O. Olarinoye Dickson O. Udebhulu Donglin Zhao Aliyu M. Aliyu Abdelsalam Al-Sarkhi
author_facet	Mukhtar Abdulkadir Olumayowa T. Kajero Fawziyah O. Olarinoye Dickson O. Udebhulu Donglin Zhao Aliyu M. Aliyu Abdelsalam Al-Sarkhi
author_sort	Mukhtar Abdulkadir
title	Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
title_short	Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
title_full	Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
title_fullStr	Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
title_full_unstemmed	Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?
title_sort	investigating the behaviour of air–water upward and downward flows: are you seeing what i am seeing?
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5a17e1c465f5424b8393b2f2f0180a5c
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Investigating the Behaviour of Air–Water Upward and Downward Flows: Are You Seeing What I Am Seeing?

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