Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow

In the present research, the effects of four 90-degree horizontal elbows with different curvature radii (17, 34, 51, and 68 cm) and an identical rectangular cross-section (20 * 34 mm) on a gas–liquid slug flow pattern have been studied experimentally and numerically. Gas and liquid superficial veloc...

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Autores principales:	Rahim Zahedi, Ali Babaee Rad
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Air-water Horizontal Slug Flow 90-degree Elbow Curvature radius Hydrodynamics behavior Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/a6fae1bee7fd480483047b8eb03d3fc5
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spelling	oai:doaj.org-article:a6fae1bee7fd480483047b8eb03d3fc52021-12-04T04:33:19ZNumerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow1110-016810.1016/j.aej.2021.07.011https://doaj.org/article/a6fae1bee7fd480483047b8eb03d3fc52022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1110016821004786https://doaj.org/toc/1110-0168In the present research, the effects of four 90-degree horizontal elbows with different curvature radii (17, 34, 51, and 68 cm) and an identical rectangular cross-section (20 * 34 mm) on a gas–liquid slug flow pattern have been studied experimentally and numerically. Gas and liquid superficial velocities in numerical and experimental parts were set in 2.5 m/s and 0.44 m/s, respectively. In the computational fluid dynamics section, the distribution of volume fraction, velocity, pressure, turbulence intensity, and swirling intensity parameters were investigated using the VoF model and the SST k-ω method. Experimental studies were conducted utilizing pressure data and signal processing tools to study the dominant frequency of slug flow alongside bandwidth distribution as well as the Shannon entropy. The results exhibited that although the dominant frequency of slug flow did not change after passing the 90-degree elbow, the frequency signal's bandwidth increased. In this regard, the application of Shannon entropy quantity revealed that the frequency distribution signal experienced a greater increase in bandwidth as the elbows’ curvature radius increases. The turbulent intensity of the elbows’ outlet reveals that by increasing the curvature radius, the flow field behaves smoother. Also, swirling intensity distribution shows that decreasing the elbow radius leads to increment in the swirling intensity.Rahim ZahediAli Babaee RadElsevierarticleAir-waterHorizontal Slug Flow90-degree ElbowCurvature radiusHydrodynamics behaviorEngineering (General). Civil engineering (General)TA1-2040ENAlexandria Engineering Journal, Vol 61, Iss 3, Pp 2536-2550 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Air-water Horizontal Slug Flow 90-degree Elbow Curvature radius Hydrodynamics behavior Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Air-water Horizontal Slug Flow 90-degree Elbow Curvature radius Hydrodynamics behavior Engineering (General). Civil engineering (General) TA1-2040 Rahim Zahedi Ali Babaee Rad Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
description	In the present research, the effects of four 90-degree horizontal elbows with different curvature radii (17, 34, 51, and 68 cm) and an identical rectangular cross-section (20 * 34 mm) on a gas–liquid slug flow pattern have been studied experimentally and numerically. Gas and liquid superficial velocities in numerical and experimental parts were set in 2.5 m/s and 0.44 m/s, respectively. In the computational fluid dynamics section, the distribution of volume fraction, velocity, pressure, turbulence intensity, and swirling intensity parameters were investigated using the VoF model and the SST k-ω method. Experimental studies were conducted utilizing pressure data and signal processing tools to study the dominant frequency of slug flow alongside bandwidth distribution as well as the Shannon entropy. The results exhibited that although the dominant frequency of slug flow did not change after passing the 90-degree elbow, the frequency signal's bandwidth increased. In this regard, the application of Shannon entropy quantity revealed that the frequency distribution signal experienced a greater increase in bandwidth as the elbows’ curvature radius increases. The turbulent intensity of the elbows’ outlet reveals that by increasing the curvature radius, the flow field behaves smoother. Also, swirling intensity distribution shows that decreasing the elbow radius leads to increment in the swirling intensity.
format	article
author	Rahim Zahedi Ali Babaee Rad
author_facet	Rahim Zahedi Ali Babaee Rad
author_sort	Rahim Zahedi
title	Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
title_short	Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
title_full	Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
title_fullStr	Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
title_full_unstemmed	Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
title_sort	numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/a6fae1bee7fd480483047b8eb03d3fc5
work_keys_str_mv	AT rahimzahedi numericalandexperimentalsimulationofgasliquidtwophaseflowin90degreeelbow AT alibabaeerad numericalandexperimentalsimulationofgasliquidtwophaseflowin90degreeelbow
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Numerical and experimental simulation of gas-liquid two-phase flow in 90-degree elbow

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