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Unveiling the physical mechanism behind pistol shrimp cavitation
Snapping shrimps use a special shaped claw to generate a cavitating high speed water jet. Cavitation formed in this way, may be used for hunting/stunning prey and communication. The present work is a novel computational effort to provide insight on the mechanisms of cavitation formation during the 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/PMC5656667/ https://www.ncbi.nlm.nih.gov/pubmed/29070815 http://dx.doi.org/10.1038/s41598-017-14312-0 |
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author | Koukouvinis, Phoevos Bruecker, Christoph Gavaises, Manolis |
author_facet | Koukouvinis, Phoevos Bruecker, Christoph Gavaises, Manolis |
author_sort | Koukouvinis, Phoevos |
collection | PubMed |
description | Snapping shrimps use a special shaped claw to generate a cavitating high speed water jet. Cavitation formed in this way, may be used for hunting/stunning prey and communication. The present work is a novel computational effort to provide insight on the mechanisms of cavitation formation during the claw closure. The geometry of the claw used here is a simplified claw model, based on prior experimental work. Techniques, such as Immersed Boundary and Homogenous Equilibrium Model (HEM), are employed to describe the claw motion and cavitating flow field respectively. The simulation methodology has been validated against prior experimental work and is applied here for claw closure at realistic conditions. Simulations show that during claw closure, a high velocity jet forms, inducing vortex roll-up around it. If the closure speed is high enough, the intensity of the swirling motion is enough to produce strong depressurization in the vortex core, leading to the formation of a cavitation ring. The cavitation ring moves along the jet axis and, soon after its formation, collapses and rebounds, producing high pressure pulses. |
format | Online Article Text |
id | pubmed-5656667 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56566672017-10-31 Unveiling the physical mechanism behind pistol shrimp cavitation Koukouvinis, Phoevos Bruecker, Christoph Gavaises, Manolis Sci Rep Article Snapping shrimps use a special shaped claw to generate a cavitating high speed water jet. Cavitation formed in this way, may be used for hunting/stunning prey and communication. The present work is a novel computational effort to provide insight on the mechanisms of cavitation formation during the claw closure. The geometry of the claw used here is a simplified claw model, based on prior experimental work. Techniques, such as Immersed Boundary and Homogenous Equilibrium Model (HEM), are employed to describe the claw motion and cavitating flow field respectively. The simulation methodology has been validated against prior experimental work and is applied here for claw closure at realistic conditions. Simulations show that during claw closure, a high velocity jet forms, inducing vortex roll-up around it. If the closure speed is high enough, the intensity of the swirling motion is enough to produce strong depressurization in the vortex core, leading to the formation of a cavitation ring. The cavitation ring moves along the jet axis and, soon after its formation, collapses and rebounds, producing high pressure pulses. Nature Publishing Group UK 2017-10-25 /pmc/articles/PMC5656667/ /pubmed/29070815 http://dx.doi.org/10.1038/s41598-017-14312-0 Text en © The Author(s) 2017 Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Koukouvinis, Phoevos Bruecker, Christoph Gavaises, Manolis Unveiling the physical mechanism behind pistol shrimp cavitation |
title | Unveiling the physical mechanism behind pistol shrimp cavitation |
title_full | Unveiling the physical mechanism behind pistol shrimp cavitation |
title_fullStr | Unveiling the physical mechanism behind pistol shrimp cavitation |
title_full_unstemmed | Unveiling the physical mechanism behind pistol shrimp cavitation |
title_short | Unveiling the physical mechanism behind pistol shrimp cavitation |
title_sort | unveiling the physical mechanism behind pistol shrimp cavitation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5656667/ https://www.ncbi.nlm.nih.gov/pubmed/29070815 http://dx.doi.org/10.1038/s41598-017-14312-0 |
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