Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel

This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelas...

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Detalles Bibliográficos
Autores principales: Zhang, Wu, Wang, Zihuang, Zhang, Meng, Lin, Jiahan, Chen, Weiqian, Hu, Yuhong, Li, Shuzhou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537931/
https://www.ncbi.nlm.nih.gov/pubmed/34683190
http://dx.doi.org/10.3390/mi12101139
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author Zhang, Wu
Wang, Zihuang
Zhang, Meng
Lin, Jiahan
Chen, Weiqian
Hu, Yuhong
Li, Shuzhou
author_facet Zhang, Wu
Wang, Zihuang
Zhang, Meng
Lin, Jiahan
Chen, Weiqian
Hu, Yuhong
Li, Shuzhou
author_sort Zhang, Wu
collection PubMed
description This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelastic flow became asymmetric and unsteady in the microchannel when the flow exceeded a critical Weissenberg number. The critical Weissenberg number was found to be different for the forward-directed flow and the backward-directed flow in the microchannel.
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spelling pubmed-85379312021-10-24 Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel Zhang, Wu Wang, Zihuang Zhang, Meng Lin, Jiahan Chen, Weiqian Hu, Yuhong Li, Shuzhou Micromachines (Basel) Article This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelastic flow became asymmetric and unsteady in the microchannel when the flow exceeded a critical Weissenberg number. The critical Weissenberg number was found to be different for the forward-directed flow and the backward-directed flow in the microchannel. MDPI 2021-09-23 /pmc/articles/PMC8537931/ /pubmed/34683190 http://dx.doi.org/10.3390/mi12101139 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wu
Wang, Zihuang
Zhang, Meng
Lin, Jiahan
Chen, Weiqian
Hu, Yuhong
Li, Shuzhou
Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title_full Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title_fullStr Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title_full_unstemmed Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title_short Flow Direction-Dependent Elastic Instability in a Symmetry-Breaking Microchannel
title_sort flow direction-dependent elastic instability in a symmetry-breaking microchannel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8537931/
https://www.ncbi.nlm.nih.gov/pubmed/34683190
http://dx.doi.org/10.3390/mi12101139
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AT wangzihuang flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel
AT zhangmeng flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel
AT linjiahan flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel
AT chenweiqian flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel
AT huyuhong flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel
AT lishuzhou flowdirectiondependentelasticinstabilityinasymmetrybreakingmicrochannel

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