Uncoupling the effects of Euler and Coriolis acceleration on the transient dynamics over a rotating wing.
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| Title: | Uncoupling the effects of Euler and Coriolis acceleration on the transient dynamics over a rotating wing. |
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| Authors: | Gururaj, Abbishek1 azg0100@auburn.edu, Moaven, Mahyar1, Buchholz, James2, Thurow, Brian1, Raghav, Vrishank1 raghav@auburn.edu |
| Source: | Journal of Fluid Mechanics. 6/10/2026, Vol. 1036, p1-33. 33p. |
| Subjects: | Angular acceleration, Coriolis force, Lift (Aerodynamics), Vortex motion, Transients (Dynamics), Wings (Anatomy) |
| Abstract: | During the steady phase of insect-wing rotation, Coriolis acceleration significantly influences the leading-edge vortex (LEV) dynamics and lift generation. However, its role during the transient phase, where Euler acceleration is dominant, has received limited attention. This study decouples the effects of Euler and Coriolis accelerations to assess their relative contributions to the transient dynamics over a rotating wing. By isolating wing acceleration (α*) from the Rossby number, we systematically examine how these rotational accelerations govern transient behaviour. Results show that increasing Euler acceleration or decreasing Coriolis acceleration produces similar effects on lift generation and global flow-field evolution; specifically, transient lift (and thus the maximum lift) increases, and the LEV evolves earlier with respect to wing displacement. Nevertheless, the mechanisms driving LEV growth differ for the two accelerations. Higher Euler acceleration increases shear-layer flux while reducing secondary-vorticity generation, thereby accelerating LEV growth. In contrast, reduced Coriolis acceleration increases shear-layer flux while diminishing spanwise vorticity flux, also causing the LEV to grow earlier in time. These findings underscore the critical roles of both accelerations in the transient phase and indicate that considering both is essential for a comprehensive understanding of rotating-wing dynamics. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194752266 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Uncoupling the effects of Euler and Coriolis acceleration on the transient dynamics over a rotating wing. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gururaj%2C+Abbishek%22">Gururaj, Abbishek</searchLink><relatesTo>1</relatesTo><i> azg0100@auburn.edu</i><br /><searchLink fieldCode="AR" term="%22Moaven%2C+Mahyar%22">Moaven, Mahyar</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Buchholz%2C+James%22">Buchholz, James</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Thurow%2C+Brian%22">Thurow, Brian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Raghav%2C+Vrishank%22">Raghav, Vrishank</searchLink><relatesTo>1</relatesTo><i> raghav@auburn.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. 6/10/2026, Vol. 1036, p1-33. 33p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Angular+acceleration%22">Angular acceleration</searchLink><br /><searchLink fieldCode="DE" term="%22Coriolis+force%22">Coriolis force</searchLink><br /><searchLink fieldCode="DE" term="%22Lift+%28Aerodynamics%29%22">Lift (Aerodynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink><br /><searchLink fieldCode="DE" term="%22Transients+%28Dynamics%29%22">Transients (Dynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Wings+%28Anatomy%29%22">Wings (Anatomy)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: During the steady phase of insect-wing rotation, Coriolis acceleration significantly influences the leading-edge vortex (LEV) dynamics and lift generation. However, its role during the transient phase, where Euler acceleration is dominant, has received limited attention. This study decouples the effects of Euler and Coriolis accelerations to assess their relative contributions to the transient dynamics over a rotating wing. By isolating wing acceleration (α*) from the Rossby number, we systematically examine how these rotational accelerations govern transient behaviour. Results show that increasing Euler acceleration or decreasing Coriolis acceleration produces similar effects on lift generation and global flow-field evolution; specifically, transient lift (and thus the maximum lift) increases, and the LEV evolves earlier with respect to wing displacement. Nevertheless, the mechanisms driving LEV growth differ for the two accelerations. Higher Euler acceleration increases shear-layer flux while reducing secondary-vorticity generation, thereby accelerating LEV growth. In contrast, reduced Coriolis acceleration increases shear-layer flux while diminishing spanwise vorticity flux, also causing the LEV to grow earlier in time. These findings underscore the critical roles of both accelerations in the transient phase and indicate that considering both is essential for a comprehensive understanding of rotating-wing dynamics. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1017/jfm.2026.11600 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 33 StartPage: 1 Subjects: – SubjectFull: Angular acceleration Type: general – SubjectFull: Coriolis force Type: general – SubjectFull: Lift (Aerodynamics) Type: general – SubjectFull: Vortex motion Type: general – SubjectFull: Transients (Dynamics) Type: general – SubjectFull: Wings (Anatomy) Type: general Titles: – TitleFull: Uncoupling the effects of Euler and Coriolis acceleration on the transient dynamics over a rotating wing. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gururaj, Abbishek – PersonEntity: Name: NameFull: Moaven, Mahyar – PersonEntity: Name: NameFull: Buchholz, James – PersonEntity: Name: NameFull: Thurow, Brian – PersonEntity: Name: NameFull: Raghav, Vrishank IsPartOfRelationships: – BibEntity: Dates: – D: 10 M: 06 Text: 6/10/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00221120 Numbering: – Type: volume Value: 1036 Titles: – TitleFull: Journal of Fluid Mechanics Type: main |
| ResultId | 1 |
