Coherent Flows in Magnetized Plasmas, in Laser Plasma and in Planetary Atmosphere

There is a fundamental nonlinearity that governs the coherent and cuasiorganised flows in magnetized plasma, high power laser-produced plasmas and planetary atmosphere. It consists of the convection of a vector field by its own velocity field. Unfolding the complexity of this self-interaction is only possible in few, nongeneric cases. However a new conceptual approach is possible if we provide freedom to the system, extending the description to a field theoretical framework. We write the Lagrangian densities for ideal fluids and for confined plasma and examine various applications.