Étude expérimentale des caractéristiques de mouillage d'une solution aqueuse de liquide ionique sur un substrat à tube à ailettes en aluminium

Translated title of the contribution: Experimental investigation of the wetting characteristics of an aqueous ionic liquid solution on an aluminum fin-tube substrate

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In falling film liquid desiccant systems, finding a suitable pair of liquid desiccant and contact surface is of primary engineering interest. This requires knowledge on the wetting characteristics of the liquid on the solid substrate, which consequently requires intensive experimental investigation. In this study, the wetting characteristics of a new ionic liquid aqueous solution in an aluminum fin-tube substrate were experimentally investigated. Then, a simple method for estimating the wetted area on the substrate through image processing was developed. Visual analysis of the surface wetting was also conducted, and three types of wetting patterns are discussed. Experimental results on the static contact angle and contact angle hysteresis suggest that the ionic liquid solution is mostly wetting, and the aluminum surface is slightly to moderately rough. It was found that the wettability of the ionic liquid solution increases as the ionic liquid mass fraction increases. The wetting hysteresis phenomenon and the factors contributing to its occurrence were also clarified. The results from this study would be useful for the development of a new model or improvement of existing wetting models, which can help improve the prediction and control of the heat and mass transfer performance in internally cooled/heated fin-tube contactors.

Original languageFrench
Pages (from-to)472-482
Number of pages11
JournalInternational Journal of Refrigeration
Volume88
DOIs
Publication statusPublished - 2018 Apr 1

Fingerprint

Ionic liquids
Wetting
Aluminum
Substrates
Contact angle
Hysteresis
Liquid films
Liquids
Contacts (fluid mechanics)
Image processing
Mass transfer
Heat transfer

Keywords

  • Aluminum fin-tube
  • Contact angle hysteresis
  • Ionic liquid
  • Wetting characteristics
  • Wetting hysteresis

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

Cite this

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title = "{\'E}tude exp{\'e}rimentale des caract{\'e}ristiques de mouillage d'une solution aqueuse de liquide ionique sur un substrat {\`a} tube {\`a} ailettes en aluminium",
abstract = "In falling film liquid desiccant systems, finding a suitable pair of liquid desiccant and contact surface is of primary engineering interest. This requires knowledge on the wetting characteristics of the liquid on the solid substrate, which consequently requires intensive experimental investigation. In this study, the wetting characteristics of a new ionic liquid aqueous solution in an aluminum fin-tube substrate were experimentally investigated. Then, a simple method for estimating the wetted area on the substrate through image processing was developed. Visual analysis of the surface wetting was also conducted, and three types of wetting patterns are discussed. Experimental results on the static contact angle and contact angle hysteresis suggest that the ionic liquid solution is mostly wetting, and the aluminum surface is slightly to moderately rough. It was found that the wettability of the ionic liquid solution increases as the ionic liquid mass fraction increases. The wetting hysteresis phenomenon and the factors contributing to its occurrence were also clarified. The results from this study would be useful for the development of a new model or improvement of existing wetting models, which can help improve the prediction and control of the heat and mass transfer performance in internally cooled/heated fin-tube contactors.",
keywords = "Aluminum fin-tube, Contact angle hysteresis, Ionic liquid, Wetting characteristics, Wetting hysteresis",
author = "Varela, {Richard Jayson} and Niccolo Giannetti and Seiichi Yamaguchi and Kiyoshi Saito and Wang, {Xin Ming} and Hiroshi Nakayama",
year = "2018",
month = "4",
day = "1",
doi = "10.1016/j.ijrefrig.2018.02.019",
language = "French",
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T1 - Étude expérimentale des caractéristiques de mouillage d'une solution aqueuse de liquide ionique sur un substrat à tube à ailettes en aluminium

AU - Varela, Richard Jayson

AU - Giannetti, Niccolo

AU - Yamaguchi, Seiichi

AU - Saito, Kiyoshi

AU - Wang, Xin Ming

AU - Nakayama, Hiroshi

PY - 2018/4/1

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N2 - In falling film liquid desiccant systems, finding a suitable pair of liquid desiccant and contact surface is of primary engineering interest. This requires knowledge on the wetting characteristics of the liquid on the solid substrate, which consequently requires intensive experimental investigation. In this study, the wetting characteristics of a new ionic liquid aqueous solution in an aluminum fin-tube substrate were experimentally investigated. Then, a simple method for estimating the wetted area on the substrate through image processing was developed. Visual analysis of the surface wetting was also conducted, and three types of wetting patterns are discussed. Experimental results on the static contact angle and contact angle hysteresis suggest that the ionic liquid solution is mostly wetting, and the aluminum surface is slightly to moderately rough. It was found that the wettability of the ionic liquid solution increases as the ionic liquid mass fraction increases. The wetting hysteresis phenomenon and the factors contributing to its occurrence were also clarified. The results from this study would be useful for the development of a new model or improvement of existing wetting models, which can help improve the prediction and control of the heat and mass transfer performance in internally cooled/heated fin-tube contactors.

AB - In falling film liquid desiccant systems, finding a suitable pair of liquid desiccant and contact surface is of primary engineering interest. This requires knowledge on the wetting characteristics of the liquid on the solid substrate, which consequently requires intensive experimental investigation. In this study, the wetting characteristics of a new ionic liquid aqueous solution in an aluminum fin-tube substrate were experimentally investigated. Then, a simple method for estimating the wetted area on the substrate through image processing was developed. Visual analysis of the surface wetting was also conducted, and three types of wetting patterns are discussed. Experimental results on the static contact angle and contact angle hysteresis suggest that the ionic liquid solution is mostly wetting, and the aluminum surface is slightly to moderately rough. It was found that the wettability of the ionic liquid solution increases as the ionic liquid mass fraction increases. The wetting hysteresis phenomenon and the factors contributing to its occurrence were also clarified. The results from this study would be useful for the development of a new model or improvement of existing wetting models, which can help improve the prediction and control of the heat and mass transfer performance in internally cooled/heated fin-tube contactors.

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KW - Wetting hysteresis

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