Cargando…
Cooperative dynamics in the penetration of a group of intruders in a granular medium
An object moving in a fluid experiences a drag force that depends on its velocity, shape and the properties of the medium. From this simplest case to the motion of a flock of birds or a school of fish, the drag forces and the hydrodynamic interactions determine the full dynamics of the system. Simil...
Autores principales: | , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2010
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065908/ https://www.ncbi.nlm.nih.gov/pubmed/21119636 http://dx.doi.org/10.1038/ncomms1123 |
_version_ | 1782201036798164992 |
---|---|
author | Pacheco-Vázquez, F. Ruiz-Suárez, J.C. |
author_facet | Pacheco-Vázquez, F. Ruiz-Suárez, J.C. |
author_sort | Pacheco-Vázquez, F. |
collection | PubMed |
description | An object moving in a fluid experiences a drag force that depends on its velocity, shape and the properties of the medium. From this simplest case to the motion of a flock of birds or a school of fish, the drag forces and the hydrodynamic interactions determine the full dynamics of the system. Similar drag forces appear when a single projectile impacts and moves through a granular medium, and this case is well studied in the literature. On the other hand, the case in which a group of intruders impact a granular material has never been considered. Here, we study the simultaneous penetration of several intruders in a very low-density granular medium. We find that the intruders move through it in a collective way, following a cooperative dynamics, whose complexity resembles flocking phenomena in living systems or the movement of reptiles in sand, wherein changes in drag are exploited to efficiently move or propel. |
format | Text |
id | pubmed-3065908 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-30659082011-03-29 Cooperative dynamics in the penetration of a group of intruders in a granular medium Pacheco-Vázquez, F. Ruiz-Suárez, J.C. Nat Commun Article An object moving in a fluid experiences a drag force that depends on its velocity, shape and the properties of the medium. From this simplest case to the motion of a flock of birds or a school of fish, the drag forces and the hydrodynamic interactions determine the full dynamics of the system. Similar drag forces appear when a single projectile impacts and moves through a granular medium, and this case is well studied in the literature. On the other hand, the case in which a group of intruders impact a granular material has never been considered. Here, we study the simultaneous penetration of several intruders in a very low-density granular medium. We find that the intruders move through it in a collective way, following a cooperative dynamics, whose complexity resembles flocking phenomena in living systems or the movement of reptiles in sand, wherein changes in drag are exploited to efficiently move or propel. Nature Publishing Group 2010-11-23 /pmc/articles/PMC3065908/ /pubmed/21119636 http://dx.doi.org/10.1038/ncomms1123 Text en Copyright © 2010, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Pacheco-Vázquez, F. Ruiz-Suárez, J.C. Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title | Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title_full | Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title_fullStr | Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title_full_unstemmed | Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title_short | Cooperative dynamics in the penetration of a group of intruders in a granular medium |
title_sort | cooperative dynamics in the penetration of a group of intruders in a granular medium |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065908/ https://www.ncbi.nlm.nih.gov/pubmed/21119636 http://dx.doi.org/10.1038/ncomms1123 |
work_keys_str_mv | AT pachecovazquezf cooperativedynamicsinthepenetrationofagroupofintrudersinagranularmedium AT ruizsuarezjc cooperativedynamicsinthepenetrationofagroupofintrudersinagranularmedium |