Reconnection of superfluid vortex bundles
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| Description: |
Barenghi, CF (Newcastle)
Friday 03 October 2008, 16:00-16:30 |
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| Created: | 2008-10-23 16:32 | ||
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| Collection: | The Nature of High Reynolds Number Turbulence | ||
| Publisher: | Isaac Newton Institute | ||
| Copyright: | Barenghi, CF | ||
| Language: | eng (English) | ||
| Distribution: |
World
(downloadable)
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| Explicit content: | No | ||
| Aspect Ratio: | 4:3 | ||
| Screencast: | No | ||
| Bumper: | UCS Default | ||
| Trailer: | UCS Default | ||
| Abstract: | Using the vortex filament model and the Gross Pitaevskii nonlinear Schroedinger equation, we show that bundles of quantised vortex lines in helium~II are structurally robust and can reconnect with each other maintaining their identity. We discuss vortex stretching in superfluid turbulence and show that, during the bundle reconnection process, a large amount of Kelvin waves is generated, in agreement with the finding that helicity is produced by nearly singular vortex interactions in classical Euler flows.
A seminar from the Inertial-Range Dynamics and Mixing conference in association with the Newton Institute programme: The Nature of High Reynolds Number Turbulence www.newton.ac.uk/programmes/HRT/seminars/ |
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