Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies
Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averagi...
Published in: | The Journal of the Acoustical Society of America |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Acoustical Society of America
2019
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/99928/ https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:99928 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:99928 2023-05-15T16:36:02+02:00 Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies Bryngelson, Spencer H. Colonius, Tim 2019-10 https://authors.library.caltech.edu/99928/ https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319 unknown Acoustical Society of America Bryngelson, Spencer H. and Colonius, Tim (2019) Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies. Journal of the Acoustical Society of America, 146 (4). p. 2771. ISSN 0001-4966. doi:10.1121/1.5136599. https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319 <https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319> Article PeerReviewed 2019 ftcaltechauth https://doi.org/10.1121/1.5136599 2021-11-18T18:53:02Z Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averaging approach is used to compute the bubble response and corresponding acoustics. We first assess the possibility of a sophisticated wave-guidance behavior of high-frequency whale vocalizations within the bubble net. For a small range of flow parameters, the reflections associated with the bubbly region result in an observable wave-guidance behavior, though even then these reflections disperse rapidly. In light of this, we also consider multiple whales surrounding the bubble net, each vocalizing towards its center. We show that for physically realistic configurations, including variations in the bubble net void fraction and number of whales, the bubble net can keep its core region substantially quieter than the exterior. Finally, we investigate the ability of spiral, rather than annular, geometries for keeping the bubble-free region quiet. Article in Journal/Newspaper Humpback Whale Caltech Authors (California Institute of Technology) The Journal of the Acoustical Society of America 146 4 2771 2771 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
description |
Humpback whales can generate bubbly regions (called bubble nets) via their blowholes, which they appear to exploit via loud vocalizations for feeding purposes. We model this phenomenon as the acoustic excitation of an dilute bubble net of radially varying void fraction. A fully coupled phase-averaging approach is used to compute the bubble response and corresponding acoustics. We first assess the possibility of a sophisticated wave-guidance behavior of high-frequency whale vocalizations within the bubble net. For a small range of flow parameters, the reflections associated with the bubbly region result in an observable wave-guidance behavior, though even then these reflections disperse rapidly. In light of this, we also consider multiple whales surrounding the bubble net, each vocalizing towards its center. We show that for physically realistic configurations, including variations in the bubble net void fraction and number of whales, the bubble net can keep its core region substantially quieter than the exterior. Finally, we investigate the ability of spiral, rather than annular, geometries for keeping the bubble-free region quiet. |
format |
Article in Journal/Newspaper |
author |
Bryngelson, Spencer H. Colonius, Tim |
spellingShingle |
Bryngelson, Spencer H. Colonius, Tim Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
author_facet |
Bryngelson, Spencer H. Colonius, Tim |
author_sort |
Bryngelson, Spencer H. |
title |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_short |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_full |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_fullStr |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_full_unstemmed |
Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies |
title_sort |
annular and spiral bubble nets: a simulation-focused analysis of humpback whale feeding strategies |
publisher |
Acoustical Society of America |
publishDate |
2019 |
url |
https://authors.library.caltech.edu/99928/ https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
Bryngelson, Spencer H. and Colonius, Tim (2019) Annular and spiral bubble nets: A simulation-focused analysis of humpback whale feeding strategies. Journal of the Acoustical Society of America, 146 (4). p. 2771. ISSN 0001-4966. doi:10.1121/1.5136599. https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319 <https://resolver.caltech.edu/CaltechAUTHORS:20191119-101701319> |
op_doi |
https://doi.org/10.1121/1.5136599 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
146 |
container_issue |
4 |
container_start_page |
2771 |
op_container_end_page |
2771 |
_version_ |
1766026337111244800 |