Sensitivity to luminosity, centrifugal force, and boundary conditions in spherical shell convection

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We test the sensitivity of hydrodynamic and magnetohydrodynamic turbulent convection simulations with respect to Mach number, thermal and magnetic boundary conditions, and the centrifugal force.

• We find that varying the luminosity, which also controls the Mach number, has only a minor effect on the large-scale dynamics.
• A similar conclusion can also be drawn from the comparison of two formulations of the lower magnetic boundary condition with either vanishing electric field or current density.
• The centrifugal force has an effect on the solutions, but only if its magnitude with respect to acceleration due to gravity is by two orders of magnitude greater than in the Sun.