A simulation of solar convection at supergranulation scale

Details A simulation of solar convection at supergranulation scale A simulation of solar convection at supergranulation scale

2001-10-09

arxiv.org/abs/astro-ph/0110208v2

Nuovo Cim.C025:523-528,2002

Astronomy and Astrophysics

Astrophysics

Contribution to the proceedings of the workshop entitled "THEMIS and the new frontiers of solar atmosphere dynamics" (March 20

Scientific paper

We present here numerical simulations of surface solar convection which cover a box of 30$\times30\times$3.2 Mm$^3$ with a resolution of 315$\times315\times$82, which is used to investigate the dynamics of scales larger than granulation. No structure resembling supergranulation is present; possibly higher Reynolds numbers (i.e. higher numerical resolution), or magnetic fields, or greater depth are necessary. The results also show interesting aspects of granular dynamics which are briefly presented, like extensive p-mode ridges in the k-$\omega$ diagram and a ringlike distribution of horizontal vorticity around granules. At large scales, the horizontal velocity is much larger than the vertical velocity and the vertical motion is dominated by p-mode oscillations.

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