Tuning the wettability of wire mesh column: pore-scale flow analysis

The pore-scale behaviour of liquid flow over wire mesh stainless-steel packing of variable contact angle is relevant for mass and heat exchanges in multiphase chemical systems. This behaviour was investigated by imaging experiments and 3D volume-of-fluid modelling. The surface of the wire mesh ring...

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Autores principales:	Mohamed Abdelraouf, Allan Rennie, Neil Burns, Louise Geekie, Vesna Najdanovic-Visak, Farid Aiouache
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Novel column packing Wettability Contact angle Liquid dispersion Process intensification Dixon Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/455f9f086ba646aeae9026118583fc5c
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spelling	oai:doaj.org-article:455f9f086ba646aeae9026118583fc5c2021-11-18T04:53:17ZTuning the wettability of wire mesh column: pore-scale flow analysis2666-821110.1016/j.ceja.2021.100181https://doaj.org/article/455f9f086ba646aeae9026118583fc5c2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S266682112100096Xhttps://doaj.org/toc/2666-8211The pore-scale behaviour of liquid flow over wire mesh stainless-steel packing of variable contact angle is relevant for mass and heat exchanges in multiphase chemical systems. This behaviour was investigated by imaging experiments and 3D volume-of-fluid modelling. The surface of the wire mesh ring was modified by alumina coating to reach both hydrophilic and hydrophobic characteristics. The cycle of capillary droplet flow over the uncoated ring exhibited penetration of the hydrophilic mesh openings, adherence to the surface of the ring and accumulation as drips at the bottom region of the rings. However, over the hydrophobic ring, the droplet exhibited low adherence to the ring surface, accumulation at the top surface of the ring, no penetration of the openings, slip by the gravitational forces over the vertical curvature and accumulation as drips at the bottom region. In agreement with the classical observations at the macroscale, the observations at the pore-scale confirmed the increase of the wetting efficiency, liquid holdup and effective surface area at increased liquid flowrate and reduced contact angle. The 3D model was in reasonable agreement with Stichlmair's model for the liquid holdup, particularly in the hydrophilic zone of the contact angle and low flow as well as in a reasonable agreement with Linek's model for effective area, particularly in the hydrophobic range of the contact angle.Mohamed AbdelraoufAllan RennieNeil BurnsLouise GeekieVesna Najdanovic-VisakFarid AiouacheElsevierarticleNovel column packingWettabilityContact angleLiquid dispersionProcess intensificationDixonChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100181- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Novel column packing Wettability Contact angle Liquid dispersion Process intensification Dixon Chemical engineering TP155-156
spellingShingle	Novel column packing Wettability Contact angle Liquid dispersion Process intensification Dixon Chemical engineering TP155-156 Mohamed Abdelraouf Allan Rennie Neil Burns Louise Geekie Vesna Najdanovic-Visak Farid Aiouache Tuning the wettability of wire mesh column: pore-scale flow analysis
description	The pore-scale behaviour of liquid flow over wire mesh stainless-steel packing of variable contact angle is relevant for mass and heat exchanges in multiphase chemical systems. This behaviour was investigated by imaging experiments and 3D volume-of-fluid modelling. The surface of the wire mesh ring was modified by alumina coating to reach both hydrophilic and hydrophobic characteristics. The cycle of capillary droplet flow over the uncoated ring exhibited penetration of the hydrophilic mesh openings, adherence to the surface of the ring and accumulation as drips at the bottom region of the rings. However, over the hydrophobic ring, the droplet exhibited low adherence to the ring surface, accumulation at the top surface of the ring, no penetration of the openings, slip by the gravitational forces over the vertical curvature and accumulation as drips at the bottom region. In agreement with the classical observations at the macroscale, the observations at the pore-scale confirmed the increase of the wetting efficiency, liquid holdup and effective surface area at increased liquid flowrate and reduced contact angle. The 3D model was in reasonable agreement with Stichlmair's model for the liquid holdup, particularly in the hydrophilic zone of the contact angle and low flow as well as in a reasonable agreement with Linek's model for effective area, particularly in the hydrophobic range of the contact angle.
format	article
author	Mohamed Abdelraouf Allan Rennie Neil Burns Louise Geekie Vesna Najdanovic-Visak Farid Aiouache
author_facet	Mohamed Abdelraouf Allan Rennie Neil Burns Louise Geekie Vesna Najdanovic-Visak Farid Aiouache
author_sort	Mohamed Abdelraouf
title	Tuning the wettability of wire mesh column: pore-scale flow analysis
title_short	Tuning the wettability of wire mesh column: pore-scale flow analysis
title_full	Tuning the wettability of wire mesh column: pore-scale flow analysis
title_fullStr	Tuning the wettability of wire mesh column: pore-scale flow analysis
title_full_unstemmed	Tuning the wettability of wire mesh column: pore-scale flow analysis
title_sort	tuning the wettability of wire mesh column: pore-scale flow analysis
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/455f9f086ba646aeae9026118583fc5c
work_keys_str_mv	AT mohamedabdelraouf tuningthewettabilityofwiremeshcolumnporescaleflowanalysis AT allanrennie tuningthewettabilityofwiremeshcolumnporescaleflowanalysis AT neilburns tuningthewettabilityofwiremeshcolumnporescaleflowanalysis AT louisegeekie tuningthewettabilityofwiremeshcolumnporescaleflowanalysis AT vesnanajdanovicvisak tuningthewettabilityofwiremeshcolumnporescaleflowanalysis AT faridaiouache tuningthewettabilityofwiremeshcolumnporescaleflowanalysis
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Tuning the wettability of wire mesh column: pore-scale flow analysis

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