The dynamics of planetary cores and subsurface oceans represent fundamental components of planetary evolution models, contributing to the balance of heat and angular momentum, energy dissipation, and the generation of magnetic fields, which can be observed both in situ and remotely. The steering mechanisms in these fluid layers encompass a
range of processes, including slow thermal and compositional convection, as well as diurnal orbital perturbations, such as precession, nutations, librations, and tides. The resulting nonlinear dynamics present a significant challenge for both numerical and experimental approaches.

In this session, we welcome theoretical, experimental and numerical works to provide a comprehensive overview of the mechanisms governing planetary cores, subsurface oceans dynamics and the geodynamo models. This includes, but not only, rotating convection, orbitally driven flows, inertial/internal waves dynamics, zonal flows, turbulence in rotating fluids as well as dynamo processes.