Cargando…

On the dynamic contact angle of capillary-driven microflows in open channels

The dynamics of a fluid flow within an open capillary channel depend on the fluid’s contact angle with the channel substrate, but determining the real value of the contact angle with the solid surface is an ominous problem in capillary microflows. The Lucas-Washburn law assumes a constant contact an...

Descripción completa

Detalles Bibliográficos
Autores principales: Tokihiro, Jodie C., Berthier, Jean, McManamen, Anika M., Phan, David N., Thongpang, Sanitta, Theberge, Ashleigh B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cold Spring Harbor Laboratory 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10168213/
https://www.ncbi.nlm.nih.gov/pubmed/37163094
http://dx.doi.org/10.1101/2023.04.24.537941
_version_ 1785038817266237440
author Tokihiro, Jodie C.
Berthier, Jean
McManamen, Anika M.
Phan, David N.
Thongpang, Sanitta
Theberge, Ashleigh B.
author_facet Tokihiro, Jodie C.
Berthier, Jean
McManamen, Anika M.
Phan, David N.
Thongpang, Sanitta
Theberge, Ashleigh B.
author_sort Tokihiro, Jodie C.
collection PubMed
description The dynamics of a fluid flow within an open capillary channel depend on the fluid’s contact angle with the channel substrate, but determining the real value of the contact angle with the solid surface is an ominous problem in capillary microflows. The Lucas-Washburn law assumes a constant contact angle during the fluid motion; however, it is observed that the contact angle of the flowing liquid with the walls differs from its static (Young) value. Correlations for the dynamic contact angle have been proposed, and upon close inspection of Lucas-Washburn behavior in closed channels, a dynamic contact angle should be taken into account depending on the flow velocity. In this work, the dynamic contact angle in open-channel configurations is investigated using experimental data obtained with different liquids. It is shown that a dynamic contact angle must be taken into account in the early stages of the flow, i.e., at the beginning of the viscous regime when flow velocities are sufficiently high. Here, we found that amongst the different correlations for the dynamic contact angle, the Hamraoui correlation— presenting the dynamic contact angle in terms of a friction coefficient—reproduces the experimental results while other correlations overpredict the fluid velocity in open channels.
format Online
Article
Text
id pubmed-10168213
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Cold Spring Harbor Laboratory
record_format MEDLINE/PubMed
spelling pubmed-101682132023-05-10 On the dynamic contact angle of capillary-driven microflows in open channels Tokihiro, Jodie C. Berthier, Jean McManamen, Anika M. Phan, David N. Thongpang, Sanitta Theberge, Ashleigh B. bioRxiv Article The dynamics of a fluid flow within an open capillary channel depend on the fluid’s contact angle with the channel substrate, but determining the real value of the contact angle with the solid surface is an ominous problem in capillary microflows. The Lucas-Washburn law assumes a constant contact angle during the fluid motion; however, it is observed that the contact angle of the flowing liquid with the walls differs from its static (Young) value. Correlations for the dynamic contact angle have been proposed, and upon close inspection of Lucas-Washburn behavior in closed channels, a dynamic contact angle should be taken into account depending on the flow velocity. In this work, the dynamic contact angle in open-channel configurations is investigated using experimental data obtained with different liquids. It is shown that a dynamic contact angle must be taken into account in the early stages of the flow, i.e., at the beginning of the viscous regime when flow velocities are sufficiently high. Here, we found that amongst the different correlations for the dynamic contact angle, the Hamraoui correlation— presenting the dynamic contact angle in terms of a friction coefficient—reproduces the experimental results while other correlations overpredict the fluid velocity in open channels. Cold Spring Harbor Laboratory 2023-04-27 /pmc/articles/PMC10168213/ /pubmed/37163094 http://dx.doi.org/10.1101/2023.04.24.537941 Text en https://creativecommons.org/licenses/by-nd/4.0/This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/by-nd/4.0/) , which allows reusers to copy and distribute the material in any medium or format in unadapted form only, and only so long as attribution is given to the creator. The license allows for commercial use.
spellingShingle Article
Tokihiro, Jodie C.
Berthier, Jean
McManamen, Anika M.
Phan, David N.
Thongpang, Sanitta
Theberge, Ashleigh B.
On the dynamic contact angle of capillary-driven microflows in open channels
title On the dynamic contact angle of capillary-driven microflows in open channels
title_full On the dynamic contact angle of capillary-driven microflows in open channels
title_fullStr On the dynamic contact angle of capillary-driven microflows in open channels
title_full_unstemmed On the dynamic contact angle of capillary-driven microflows in open channels
title_short On the dynamic contact angle of capillary-driven microflows in open channels
title_sort on the dynamic contact angle of capillary-driven microflows in open channels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10168213/
https://www.ncbi.nlm.nih.gov/pubmed/37163094
http://dx.doi.org/10.1101/2023.04.24.537941
work_keys_str_mv AT tokihirojodiec onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels
AT berthierjean onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels
AT mcmanamenanikam onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels
AT phandavidn onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels
AT thongpangsanitta onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels
AT thebergeashleighb onthedynamiccontactangleofcapillarydrivenmicroflowsinopenchannels