Moin, Parviz and Leonard, Anthony and Kim, John (1986) Evolution of a curved vortex filament into a vortex ring. Physics of Fluids, 29 (4). pp. 955-963. ISSN 0031-9171. doi:10.1063/1.865690. https://resolver.caltech.edu/CaltechAUTHORS:MOIpof86
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Abstract
The deformation of a hairpin-shaped vortex filament under self-induction and in the presence of shear is studied numerically using the Biot–Savart law. It is shown that the tip region of an elongated hairpin vortex evolves into a vortex ring and that the presence of mean shear impedes the process. In addition, evolution of a finite-thickness vortex sheet under self-induction is investigated using the Navier–Stokes equations. The layer evolves into a hairpin vortex, which in turn produces a vortex ring of high Reynolds stress content. These results indicate a mechanism for the generation of ring vortices in turbulent shear flows, and a link between the experimental and numerical observation of hairpin vortices and the observation of Falco [Phys. Fluids 20, S124 (1977)] of ring vortices in the outer regions of turbulent boundary layers.
| Item Type: | Article | ||||||
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| Additional Information: | © 1986 American Institute of Physics. Received 26 September 1985; accepted 18 December 1985. We are grateful to Dr. Nagi Mansour and Dr. Robert Rogallo for helpful comments on a draft of this manuscript. | ||||||
| Group: | GALCIT | ||||||
| Issue or Number: | 4 | ||||||
| DOI: | 10.1063/1.865690 | ||||||
| Record Number: | CaltechAUTHORS:MOIpof86 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:MOIpof86 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 10576 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Tony Diaz | ||||||
| Deposited On: | 19 May 2008 | ||||||
| Last Modified: | 08 Nov 2021 21:09 |
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