On the kinetic foundations of Kaluza's magnetohydrodynamics

Recent work has shown the existence of a relativistic effect present in a single component nonequilibrium fluid, corresponding to a heat flux due to an electric field [1]. The treatment in that work was limited to a four-dimensional Minkowski space-time in which the Boltzmann equation was treated in a special relativistic approach. The more complete framework of general relativity can be introduced to kinetic theory in order to describe transport processes associated to electromagnetic fields. In this context, the original Kaluza's formalism is a promising approach [2-4]. The present work contains a kinetic theory basis for Kaluza's magnetohydrodynamics and gives a novel description for the establishment of thermodynamic forces beyond the special relativistic description.