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Fluid leakage near the percolation threshold
Percolation is a concept widely used in many fields of research and refers to the propagation of substances through porous media (e.g., coffee filtering), or the behaviour of complex networks (e.g., spreading of diseases). Percolation theory asserts that most percolative processes are universal, tha...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4738257/ https://www.ncbi.nlm.nih.gov/pubmed/26839261 http://dx.doi.org/10.1038/srep19513 |
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author | Dapp, Wolf B. Müser, Martin H. |
author_facet | Dapp, Wolf B. Müser, Martin H. |
author_sort | Dapp, Wolf B. |
collection | PubMed |
description | Percolation is a concept widely used in many fields of research and refers to the propagation of substances through porous media (e.g., coffee filtering), or the behaviour of complex networks (e.g., spreading of diseases). Percolation theory asserts that most percolative processes are universal, that is, the emergent powerlaws only depend on the general, statistical features of the macroscopic system, but not on specific details of the random realisation. In contrast, our computer simulations of the leakage through a seal—applying common assumptions of elasticity, contact mechanics, and fluid dynamics—show that the critical behaviour (how the flow ceases near the sealing point) solely depends on the microscopic details of the last constriction. It appears fundamentally impossible to accurately predict from statistical properties of the surfaces alone how strongly we have to tighten a water tap to make it stop dripping and also how it starts dripping once we loosen it again. |
format | Online Article Text |
id | pubmed-4738257 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47382572016-02-09 Fluid leakage near the percolation threshold Dapp, Wolf B. Müser, Martin H. Sci Rep Article Percolation is a concept widely used in many fields of research and refers to the propagation of substances through porous media (e.g., coffee filtering), or the behaviour of complex networks (e.g., spreading of diseases). Percolation theory asserts that most percolative processes are universal, that is, the emergent powerlaws only depend on the general, statistical features of the macroscopic system, but not on specific details of the random realisation. In contrast, our computer simulations of the leakage through a seal—applying common assumptions of elasticity, contact mechanics, and fluid dynamics—show that the critical behaviour (how the flow ceases near the sealing point) solely depends on the microscopic details of the last constriction. It appears fundamentally impossible to accurately predict from statistical properties of the surfaces alone how strongly we have to tighten a water tap to make it stop dripping and also how it starts dripping once we loosen it again. Nature Publishing Group 2016-02-03 /pmc/articles/PMC4738257/ /pubmed/26839261 http://dx.doi.org/10.1038/srep19513 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Dapp, Wolf B. Müser, Martin H. Fluid leakage near the percolation threshold |
title | Fluid leakage near the percolation threshold |
title_full | Fluid leakage near the percolation threshold |
title_fullStr | Fluid leakage near the percolation threshold |
title_full_unstemmed | Fluid leakage near the percolation threshold |
title_short | Fluid leakage near the percolation threshold |
title_sort | fluid leakage near the percolation threshold |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4738257/ https://www.ncbi.nlm.nih.gov/pubmed/26839261 http://dx.doi.org/10.1038/srep19513 |
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