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Characterizing rare fluctuations in soft particulate flows
Soft particulate media include a wide range of systems involving athermal dissipative particles both in non-living and biological materials. Characterization of flows of particulate media is of great practical and theoretical importance. A fascinating feature of these systems is the existence of a c...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431914/ https://www.ncbi.nlm.nih.gov/pubmed/28396590 http://dx.doi.org/10.1038/s41467-017-00022-8 |
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author | Rahbari, S.H.E. Saberi, A.A. Park, Hyunggyu Vollmer, J. |
author_facet | Rahbari, S.H.E. Saberi, A.A. Park, Hyunggyu Vollmer, J. |
author_sort | Rahbari, S.H.E. |
collection | PubMed |
description | Soft particulate media include a wide range of systems involving athermal dissipative particles both in non-living and biological materials. Characterization of flows of particulate media is of great practical and theoretical importance. A fascinating feature of these systems is the existence of a critical rigidity transition in the dense regime dominated by highly intermittent fluctuations that severely affects the flow properties. Here, we unveil the underlying mechanisms of rare fluctuations in soft particulate flows. We find that rare fluctuations have different origins above and below the critical jamming density and become suppressed near the jamming transition. We then conjecture a time-independent local fluctuation relation, which we verify numerically, and that gives rise to an effective temperature. We discuss similarities and differences between our proposed effective temperature with the conventional kinetic temperature in the system by means of a universal scaling collapse. |
format | Online Article Text |
id | pubmed-5431914 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54319142017-05-18 Characterizing rare fluctuations in soft particulate flows Rahbari, S.H.E. Saberi, A.A. Park, Hyunggyu Vollmer, J. Nat Commun Article Soft particulate media include a wide range of systems involving athermal dissipative particles both in non-living and biological materials. Characterization of flows of particulate media is of great practical and theoretical importance. A fascinating feature of these systems is the existence of a critical rigidity transition in the dense regime dominated by highly intermittent fluctuations that severely affects the flow properties. Here, we unveil the underlying mechanisms of rare fluctuations in soft particulate flows. We find that rare fluctuations have different origins above and below the critical jamming density and become suppressed near the jamming transition. We then conjecture a time-independent local fluctuation relation, which we verify numerically, and that gives rise to an effective temperature. We discuss similarities and differences between our proposed effective temperature with the conventional kinetic temperature in the system by means of a universal scaling collapse. Nature Publishing Group UK 2017-04-10 /pmc/articles/PMC5431914/ /pubmed/28396590 http://dx.doi.org/10.1038/s41467-017-00022-8 Text en © The Author(s) 2017 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 Rahbari, S.H.E. Saberi, A.A. Park, Hyunggyu Vollmer, J. Characterizing rare fluctuations in soft particulate flows |
title | Characterizing rare fluctuations in soft particulate flows |
title_full | Characterizing rare fluctuations in soft particulate flows |
title_fullStr | Characterizing rare fluctuations in soft particulate flows |
title_full_unstemmed | Characterizing rare fluctuations in soft particulate flows |
title_short | Characterizing rare fluctuations in soft particulate flows |
title_sort | characterizing rare fluctuations in soft particulate flows |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431914/ https://www.ncbi.nlm.nih.gov/pubmed/28396590 http://dx.doi.org/10.1038/s41467-017-00022-8 |
work_keys_str_mv | AT rahbarishe characterizingrarefluctuationsinsoftparticulateflows AT saberiaa characterizingrarefluctuationsinsoftparticulateflows AT parkhyunggyu characterizingrarefluctuationsinsoftparticulateflows AT vollmerj characterizingrarefluctuationsinsoftparticulateflows |