Flow pumping by external periodic shear applied to a soft interface

Flow pumping in viscous fluids is of prime importance in micro-fluidic applications. Here we show that a single colloidal particle in front of a soft wall, manipulated by external means like an optical tweezer, can pump the ambient viscous fluid. The particle, moving back and forth parallel to the s...

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Detalles Bibliográficos
Autores principales: Nezamipour, Shima, Najafi, Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8298434/
https://www.ncbi.nlm.nih.gov/pubmed/34294793
http://dx.doi.org/10.1038/s41598-021-94398-9
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author Nezamipour, Shima
Najafi, Ali
author_facet Nezamipour, Shima
Najafi, Ali
author_sort Nezamipour, Shima
collection PubMed
description Flow pumping in viscous fluids is of prime importance in micro-fluidic applications. Here we show that a single colloidal particle in front of a soft wall, manipulated by external means like an optical tweezer, can pump the ambient viscous fluid. The particle, moving back and forth parallel to the soft wall, can produce an averaged net flow in a direction perpendicular to the wall. Using a perturbative scheme, we present the results. Analysis show that this flow in terms of capillary number, scales as [Formula: see text] .
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spelling pubmed-82984342021-07-23 Flow pumping by external periodic shear applied to a soft interface Nezamipour, Shima Najafi, Ali Sci Rep Article Flow pumping in viscous fluids is of prime importance in micro-fluidic applications. Here we show that a single colloidal particle in front of a soft wall, manipulated by external means like an optical tweezer, can pump the ambient viscous fluid. The particle, moving back and forth parallel to the soft wall, can produce an averaged net flow in a direction perpendicular to the wall. Using a perturbative scheme, we present the results. Analysis show that this flow in terms of capillary number, scales as [Formula: see text] . Nature Publishing Group UK 2021-07-22 /pmc/articles/PMC8298434/ /pubmed/34294793 http://dx.doi.org/10.1038/s41598-021-94398-9 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Nezamipour, Shima
Najafi, Ali
Flow pumping by external periodic shear applied to a soft interface
title Flow pumping by external periodic shear applied to a soft interface
title_full Flow pumping by external periodic shear applied to a soft interface
title_fullStr Flow pumping by external periodic shear applied to a soft interface
title_full_unstemmed Flow pumping by external periodic shear applied to a soft interface
title_short Flow pumping by external periodic shear applied to a soft interface
title_sort flow pumping by external periodic shear applied to a soft interface
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8298434/
https://www.ncbi.nlm.nih.gov/pubmed/34294793
http://dx.doi.org/10.1038/s41598-021-94398-9
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