Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam

Abstract Foams can be ubiquitously observed in nature and in industrial products. Despite the relevance of their properties to deformation, fluidity, and collapse, all of which are essential for applications, there are few experimental studies of collective relaxation dynamics in a wet foam. Here, w...

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Autores principales:	Naoya Yanagisawa, Rei Kurita
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0d736f84ce044085aad4eaa89913a516
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spelling	oai:doaj.org-article:0d736f84ce044085aad4eaa89913a5162021-12-02T14:06:19ZSize distribution dependence of collective relaxation dynamics in a two-dimensional wet foam10.1038/s41598-021-82267-42045-2322https://doaj.org/article/0d736f84ce044085aad4eaa89913a5162021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82267-4https://doaj.org/toc/2045-2322Abstract Foams can be ubiquitously observed in nature and in industrial products. Despite the relevance of their properties to deformation, fluidity, and collapse, all of which are essential for applications, there are few experimental studies of collective relaxation dynamics in a wet foam. Here, we directly observe how the relaxation dynamics changes with increasing liquid fraction in both monodisperse and polydisperse two-dimensional foams. As we increase the liquid fraction, we quantitatively characterize the slowing-down of the relaxation, and the increase of the correlation length. We also find two different relaxation modes which depend on the size distribution of the bubbles. It suggests that the bubbles which are simply near to each other play an important role in large rearrangements, not just those in direct contact. Finally, we confirm the generality of our experimental findings by a numerical simulation for the relaxation process of wet foams.Naoya YanagisawaRei KuritaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Naoya Yanagisawa Rei Kurita Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
description	Abstract Foams can be ubiquitously observed in nature and in industrial products. Despite the relevance of their properties to deformation, fluidity, and collapse, all of which are essential for applications, there are few experimental studies of collective relaxation dynamics in a wet foam. Here, we directly observe how the relaxation dynamics changes with increasing liquid fraction in both monodisperse and polydisperse two-dimensional foams. As we increase the liquid fraction, we quantitatively characterize the slowing-down of the relaxation, and the increase of the correlation length. We also find two different relaxation modes which depend on the size distribution of the bubbles. It suggests that the bubbles which are simply near to each other play an important role in large rearrangements, not just those in direct contact. Finally, we confirm the generality of our experimental findings by a numerical simulation for the relaxation process of wet foams.
format	article
author	Naoya Yanagisawa Rei Kurita
author_facet	Naoya Yanagisawa Rei Kurita
author_sort	Naoya Yanagisawa
title	Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
title_short	Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
title_full	Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
title_fullStr	Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
title_full_unstemmed	Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
title_sort	size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0d736f84ce044085aad4eaa89913a516
work_keys_str_mv	AT naoyayanagisawa sizedistributiondependenceofcollectiverelaxationdynamicsinatwodimensionalwetfoam AT reikurita sizedistributiondependenceofcollectiverelaxationdynamicsinatwodimensionalwetfoam
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Size distribution dependence of collective relaxation dynamics in a two-dimensional wet foam

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