Jon Rotvig ,  Max-Planck-Institute for Solar System Research, Germany

The Boussinesq approximation is commonly used,with a few exceptions, to model the dynamics
of planetary cores. On this poster, I describe a recent pseudo-spectral implementation of a
model of thermal compressible convection in a spherical shell. The compressibility is
described within the anelastic framework.This model is based on the non-turbulent
and single-fluid part of Anufriev $et\;al.$ (in preparation, 2004). From seismology
and experimental high-pressure physics on iron, the reference state of the fluid outer
core of the Earth is well-known. I use this reference state as basis for the perturbed
state. The system is driven by asuper-adiabatic heat flux at the ICB, and
the bulk heat source is neglected. Later the magnetic counterpart of this system
will be considered.