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Evolution of a curved vortex filament into a vortex ring
| Content Provider | Semantic Scholar |
|---|---|
| Author | Moin, Parviz Leonard, A. Kim, John |
| Copyright Year | 1986 |
| 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. |
| Starting Page | 955 |
| Ending Page | 963 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.865690 |
| Volume Number | 29 |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19860005061.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
