Behavior of hydrodynamic and magnetohydrodynamic turbulence in a rotating sphere with precession and dynamo action

In this work, the effect of precession in a rotating sphere filled with fluid is investigated using direct numerical simulations. Incompressible hydrodynamics and magnetohydrodynamics scenarios are examined. In the latter case, a comparison between the effect of prograde and retrograde precession is presented. We show that retrograde precession is more efficient at generating self-sustaining dynamos due to the presence of a stronger turbulent regime. Finally, the behavior of the magnetic dipole moment and its reversals are studied.