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“On the direct and inverse energy
transfer in 2-dimensional and
3-dimensional turbulent flows”
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Date: |
Download-files: |
Time: |
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Thursday, 30. Jan. 2014 |
Audio-only-Recording as MP3-File
(smallest possible size):
- Audio.mp3 (ca.24Mb) ============================================ Video-Recording for any system with MP4-support:
- Video.mp4 (ca.234Mb) |
15:15 – 16:10 |
Abstract:
In this
seminar, I will discuss a few important open problems in 'Fully Developed
Turbulence' concerning its most
idealised
realisation, i.e. the case of statistically homogeneous and isotropic flows. I
will discuss the importance of
inviscid conserved quantities in relation to the most
striking statistical properties shown by all turbulent flows:
the
growth of small-scales strongly non-Gaussian fluctuations, including the
presence of anomalous scaling laws.
By using
unconventional numerical methodology, based on a Galerkin decimation of helical
Fourier modes,
I will
argue that some phenomena characterising homogeneous and isotropic flows might
be important also for a
much
larger spectrum of applications, including flows with geophysical and
astrophysical relevance as for the case
of
rotating turbulence and/or conducting fluids.