Subharmonic instability of a self-organized granular jet

Downhill flows of granular matter colliding in the lowest point of a valley, may induce a self-organized jet. By means of a quasi two-dimensional experiment where fine grained sand flows in a vertically sinusoidally agitated cylinder, we show that the emergent jet, that is, a sheet of ejecta, does n...

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Detalles Bibliográficos
Autores principales: Kollmer, J. E., Pöschel, T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4802379/
https://www.ncbi.nlm.nih.gov/pubmed/27001207
http://dx.doi.org/10.1038/srep22520
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author Kollmer, J. E.
Pöschel, T.
author_facet Kollmer, J. E.
Pöschel, T.
author_sort Kollmer, J. E.
collection PubMed
description Downhill flows of granular matter colliding in the lowest point of a valley, may induce a self-organized jet. By means of a quasi two-dimensional experiment where fine grained sand flows in a vertically sinusoidally agitated cylinder, we show that the emergent jet, that is, a sheet of ejecta, does not follow the frequency of agitation but reveals subharmonic response. The order of the subharmonics is a complex function of the parameters of driving.
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spelling pubmed-48023792016-03-23 Subharmonic instability of a self-organized granular jet Kollmer, J. E. Pöschel, T. Sci Rep Article Downhill flows of granular matter colliding in the lowest point of a valley, may induce a self-organized jet. By means of a quasi two-dimensional experiment where fine grained sand flows in a vertically sinusoidally agitated cylinder, we show that the emergent jet, that is, a sheet of ejecta, does not follow the frequency of agitation but reveals subharmonic response. The order of the subharmonics is a complex function of the parameters of driving. Nature Publishing Group 2016-03-22 /pmc/articles/PMC4802379/ /pubmed/27001207 http://dx.doi.org/10.1038/srep22520 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
Kollmer, J. E.
Pöschel, T.
Subharmonic instability of a self-organized granular jet
title Subharmonic instability of a self-organized granular jet
title_full Subharmonic instability of a self-organized granular jet
title_fullStr Subharmonic instability of a self-organized granular jet
title_full_unstemmed Subharmonic instability of a self-organized granular jet
title_short Subharmonic instability of a self-organized granular jet
title_sort subharmonic instability of a self-organized granular jet
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4802379/
https://www.ncbi.nlm.nih.gov/pubmed/27001207
http://dx.doi.org/10.1038/srep22520
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