97-18U

Statistical hydrodynamics for a mixture of magnetic and nonmagnetic atoms in an external nonhomogeneous magnetic field ${\bf B}({\bf r};t)$ is considered. The problem of derivation of generalized equations of hydrodynamics for magnetic and nonmagnetic atomic subsystems with the help of nonequilibrium statistical operator method to describe both strongly and slightly nonequilibrium states is formulated. The description enables treatment of interacting subsystems to be in different nonequilibrium states. In so doing magnetic and nonmagnetic subsystems are characterized by their nonequilibrium thermodynamics paramiters. As a result nonequilibrium thermodynamical relations and generalized equations of hydrodynamics are given.