Volume 430, Number 3, February II 2005
|Page(s)||L57 - L60|
|Published online||26 January 2005|
Letter to the Editor
Mesoscale flows in large aspect ratio simulations of turbulent compressible convection
Laboratoire d'Astrophysique de Toulouse-Tarbes, UMR CNRS 5572, Observatoire Midi-Pyrénées, 14 avenue É. Belin, 31400 Toulouse, France e-mail: email@example.com
Accepted: 19 December 2004
We present the results of a very large aspect ratio () numerical simulation of fully compressible turbulent convection in a polytropic atmosphere, and focus on the properties of large-scale flows. Mesoscale patterns dominate the turbulent energy spectrum. We show that these structures, which had already been observed in Boussinesq simulations by [CITE], have a genuine convective origin and do not result directly from collective interactions of the smaller scales of the flow, even though their growth is strongly affected by nonlinear transfers. If this result is relevant to the solar photosphere, it suggests that the dominant convective mode below the Sun's surface may be at mesoscales.
Key words: Sun: granulation / convection / turbulence
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.