Rotating `star-in-a-box' experiments

Details Rotating `star-in-a-box' experiments Rotating `star-in-a-box' experiments

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007an....328.1054s&link_type=abstract

Astronomische Nachrichten, Vol.328, Issue 10, p.1054-1058

Astronomy and Astrophysics

Astronomy

9

Convection, Hydrodynamics, Radiative Transfer, Stars: Rotation, Supergiants

Scientific paper

Using the radiation hydrodynamics code CO5BOLD in its `star-in-a-box' setup, we have performed exploratory simulations of global convection in a rotating reference frame. The goal is to study the interaction of convection and rotation by direct numerical simulation. For these first experiments, we chose an idealized configuration (a scaled-down, fast rotating Sun) whose properties resemble those of red supergiants in some respect. We describe the setup and time evolution of these models, and discuss the particular problems we have encountered. Finally, we derive the resulting differential rotation pattern and meridional flow field by temporal and azimuthal averaging of the simulation data. We find anti-solar differential rotation for all cases studied so far.
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