| Issue |
Europhys. Lett.
Volume 59, Number 5, September 2002
|
|
|---|---|---|
| Page(s) | 687 - 693 | |
| Section | Electromagnitism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2002-00180-y | |
| Published online | 01 September 2002 | |
Inverse cascade in Charney-Hasegawa-Mima turbulence
1
Dipartimento di Fisica Generale, Università di Torino
Via Pietro Giuria 1, 10125 Torino, Italy
2
INFM Sezione di Torino Università -
Corso Raffaello 30, 10125 Torino, Italy
Received:
25
March
2002
Accepted:
12
June
2002
The inverse energy cascade in the Charney-Hasegawa-Mima turbulence
is investigated. The Kolmogorov law for the third-order
velocity structure function is derived and shown to be independent of the
parameter λ, at variance with the energy spectrum, as shown
by high-resolution direct numerical simulations.
In the asymptotic limit of strong rotation, 
,
the Kolmogorov constant is found to be 
while coherent vortices are observed to form at a dynamical scale
which slowly grows with time.
These vortices form an almost quenched pattern and induce a strong
deviation form Gaussianity in the velocity field.
PACS: 47.27.Eq – Turbulence simulation and modeling / 52.35.Ra – Plasma turbulence / 92.60.Ek – Convection, turbulence, and diffusion
© EDP Sciences, 2002
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