Triple cascade and zonal flows in beta-plane turbulence
34 mins 28 secs,
31.56 MB,
MP3
44100 Hz,
125.02 kbits/sec
Share this media item:
Embed this media item:
Embed this media item:
About this item
Description: |
Nazarenko, S (Warwick)
Thursday 11 December 2008, 10:30-11:00 |
---|
Created: | 2009-01-15 17:03 | ||
---|---|---|---|
Collection: | The Nature of High Reynolds Number Turbulence | ||
Publisher: | Isaac Newton Institute | ||
Copyright: | Nazarenko, S | ||
Language: | eng (English) | ||
Distribution: | World (downloadable) | ||
Credits: |
|
||
Explicit content: | No | ||
Aspect Ratio: | 4:3 | ||
Screencast: | No | ||
Bumper: | UCS Default | ||
Trailer: | UCS Default |
Abstract: | At low amplitudes, the beta-plane model has three conservation laws: the energy, the potential enstrophy and the zonostrophy (an additional invariant found by Balk, Nazarenko and Zakharov in 1991). Application of a standard Fjortoft argument to this system leads to a conclusion that these 3 invariants must cascade in an anisotropic fashion, each cascade occupying its own sector in the 2D k-space. It appears that the energy cascade sector corresponds to generation of large-scale zonal flows in the system. I will discuss some recent numerics aimed at checking conservation of zonostrophy and the triple cascade property.
A seminar from the Rotating Stratified Turbulence and Turbulence in the Atmosphere and Oceans conference in association with the Newton Institute programme: The Nature of High Reynolds Number Turbulence www.newton.ac.uk/programmes/HRT/seminars/ |
---|
Available Formats
Format | Quality | Bitrate | Size | |||
---|---|---|---|---|---|---|
MPEG-4 Video | 480x360 | 1.83 Mbits/sec | 478.89 MB | View | Download | |
WebM | 450x360 | 764.79 kbits/sec | 193.91 MB | View | Download | |
Flash Video | 480x360 | 801.51 kbits/sec | 204.68 MB | View | Download | |
iPod Video | 480x360 | 503.04 kbits/sec | 128.46 MB | View | Download | |
QuickTime | 384x288 | 844.22 kbits/sec | 215.59 MB | View | Download | |
MP3 * | 44100 Hz | 125.02 kbits/sec | 31.56 MB | Listen | Download | |
Windows Media Video | 475.7 kbits/sec | 121.48 MB | View | Download | ||
Auto | (Allows browser to choose a format it supports) |