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        On the direct and inverse energy transfer in 2-dimensional and

3-dimensional turbulent flows”

 

        Date:

 Download-files:

      Time:

 Thursday, 30. Jan. 2014

Audio-only-Recording as MP3-File (smallest possible size):

       -   Audio.mp3  (ca.24Mb)

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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.

 

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