Global weak solutions to the equations of thermal convection in micropolar fluids subjected to Hall current

In this paper we study the equations describing the thermal convection in an incompressible viscous electrically conducting micropolar fluid in the presence of a magnetic field, taking into account the effect of Hall current. The system is a combination of the generalized magnetic induction, the equations of micropolar fluids and the temperature equation. We prove long-time and large-data existence of a weak solution with decreasing energy to the system posed in a bounded domain of R3 and equipped with initial and boundary conditions.