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A granular mechanics model study of the influence of non-spherical shape on aggregate collisions

Collisions between granular aggregates influence the size distribution of dust clouds. Granular aggregates may possess non-spherical shapes as a result of, for instance, previous collision processes. Here, we study aggregate collisions using a granular mechanics simulation code. Collisions between s...

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Autores principales: Bandyopadhyay, Rahul, Urbassek, Herbert M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9902611/
https://www.ncbi.nlm.nih.gov/pubmed/36747016
http://dx.doi.org/10.1038/s41598-023-29247-y
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author Bandyopadhyay, Rahul
Urbassek, Herbert M.
author_facet Bandyopadhyay, Rahul
Urbassek, Herbert M.
author_sort Bandyopadhyay, Rahul
collection PubMed
description Collisions between granular aggregates influence the size distribution of dust clouds. Granular aggregates may possess non-spherical shapes as a result of, for instance, previous collision processes. Here, we study aggregate collisions using a granular mechanics simulation code. Collisions between spherical aggregates are compared to collisions of ellipsoidal aggregates of equal mass. As the most prominent result, we find that the growth velocity, i.e., the velocity above which the post-collision aggregates are smaller than before collision, is generally reduced for ellipsoidal aggregates. The reason hereto lies in the less compact structure of ellipsoids which allows for a larger degree of fragmentation in a ‘rim peel-off’ mechanism. On the other hand, relative fragment distributions are only little influenced by aggregate shape.
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spelling pubmed-99026112023-02-08 A granular mechanics model study of the influence of non-spherical shape on aggregate collisions Bandyopadhyay, Rahul Urbassek, Herbert M. Sci Rep Article Collisions between granular aggregates influence the size distribution of dust clouds. Granular aggregates may possess non-spherical shapes as a result of, for instance, previous collision processes. Here, we study aggregate collisions using a granular mechanics simulation code. Collisions between spherical aggregates are compared to collisions of ellipsoidal aggregates of equal mass. As the most prominent result, we find that the growth velocity, i.e., the velocity above which the post-collision aggregates are smaller than before collision, is generally reduced for ellipsoidal aggregates. The reason hereto lies in the less compact structure of ellipsoids which allows for a larger degree of fragmentation in a ‘rim peel-off’ mechanism. On the other hand, relative fragment distributions are only little influenced by aggregate shape. Nature Publishing Group UK 2023-02-06 /pmc/articles/PMC9902611/ /pubmed/36747016 http://dx.doi.org/10.1038/s41598-023-29247-y Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Bandyopadhyay, Rahul
Urbassek, Herbert M.
A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title_full A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title_fullStr A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title_full_unstemmed A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title_short A granular mechanics model study of the influence of non-spherical shape on aggregate collisions
title_sort granular mechanics model study of the influence of non-spherical shape on aggregate collisions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9902611/
https://www.ncbi.nlm.nih.gov/pubmed/36747016
http://dx.doi.org/10.1038/s41598-023-29247-y
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