Simulation of humpback whale bubble-net feeding models
Humpback whales can generate intricate bubbly regions, called bubble nets, via their blowholes. They appear to exploit these bubble nets for feeding via loud vocalizations. A fully-coupled phase-averaging approach is used to model the flow, bubble dynamics, and corresponding acoustics. A previously...
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ftdatacite:10.48550/arxiv.1909.11768 2023-05-15T16:36:04+02:00 Simulation of humpback whale bubble-net feeding models Bryngelson, Spencer H. Colonius, Tim 2019 https://dx.doi.org/10.48550/arxiv.1909.11768 https://arxiv.org/abs/1909.11768 unknown arXiv https://dx.doi.org/10.1121/10.0000746 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Fluid Dynamics physics.flu-dyn FOS Physical sciences article-journal Article ScholarlyArticle Text 2019 ftdatacite https://doi.org/10.48550/arxiv.1909.11768 https://doi.org/10.1121/10.0000746 2022-03-10T16:37:45Z Humpback whales can generate intricate bubbly regions, called bubble nets, via their blowholes. They appear to exploit these bubble nets for feeding via loud vocalizations. A fully-coupled phase-averaging approach is used to model the flow, bubble dynamics, and corresponding acoustics. A previously hypothesized waveguiding mechanism is assessed for varying acoustic frequencies and net void fractions. Reflections within the bubbly region result in observable waveguiding for only a small range of flow parameters. A configuration of multiple whales surrounding and vocalizing towards an annular bubble net is also analyzed. For a range of flow parameters the bubble net keeps its core region substantially quieter than the exterior. This approach appears more viable, though it relies upon the cooperation of multiple whales. A spiral bubble net configuration that circumvents this requirement is also investigated. The acoustic wave behaviors in the spiral interior vary qualitatively with the vocalization frequency and net void fraction. The competing effects of vocalization guiding and acoustic attenuation are quantified. Low void fraction cases allow low-frequency waves to partially escape the spiral region, with the remaining vocalizations still exciting the net interior. Higher void fraction nets appear preferable, guiding even low-frequency vocalizations while still maintaining a quiet net interior. : 11 pages, 9 figures, submitted to J. Acoust. Soc. Am Article in Journal/Newspaper Humpback Whale DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Fluid Dynamics physics.flu-dyn FOS Physical sciences |
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Fluid Dynamics physics.flu-dyn FOS Physical sciences Bryngelson, Spencer H. Colonius, Tim Simulation of humpback whale bubble-net feeding models |
topic_facet |
Fluid Dynamics physics.flu-dyn FOS Physical sciences |
description |
Humpback whales can generate intricate bubbly regions, called bubble nets, via their blowholes. They appear to exploit these bubble nets for feeding via loud vocalizations. A fully-coupled phase-averaging approach is used to model the flow, bubble dynamics, and corresponding acoustics. A previously hypothesized waveguiding mechanism is assessed for varying acoustic frequencies and net void fractions. Reflections within the bubbly region result in observable waveguiding for only a small range of flow parameters. A configuration of multiple whales surrounding and vocalizing towards an annular bubble net is also analyzed. For a range of flow parameters the bubble net keeps its core region substantially quieter than the exterior. This approach appears more viable, though it relies upon the cooperation of multiple whales. A spiral bubble net configuration that circumvents this requirement is also investigated. The acoustic wave behaviors in the spiral interior vary qualitatively with the vocalization frequency and net void fraction. The competing effects of vocalization guiding and acoustic attenuation are quantified. Low void fraction cases allow low-frequency waves to partially escape the spiral region, with the remaining vocalizations still exciting the net interior. Higher void fraction nets appear preferable, guiding even low-frequency vocalizations while still maintaining a quiet net interior. : 11 pages, 9 figures, submitted to J. Acoust. Soc. Am |
format |
Article in Journal/Newspaper |
author |
Bryngelson, Spencer H. Colonius, Tim |
author_facet |
Bryngelson, Spencer H. Colonius, Tim |
author_sort |
Bryngelson, Spencer H. |
title |
Simulation of humpback whale bubble-net feeding models |
title_short |
Simulation of humpback whale bubble-net feeding models |
title_full |
Simulation of humpback whale bubble-net feeding models |
title_fullStr |
Simulation of humpback whale bubble-net feeding models |
title_full_unstemmed |
Simulation of humpback whale bubble-net feeding models |
title_sort |
simulation of humpback whale bubble-net feeding models |
publisher |
arXiv |
publishDate |
2019 |
url |
https://dx.doi.org/10.48550/arxiv.1909.11768 https://arxiv.org/abs/1909.11768 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
https://dx.doi.org/10.1121/10.0000746 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1909.11768 https://doi.org/10.1121/10.0000746 |
_version_ |
1766026368231931904 |