Relativistic Viscous Fluid Description of Black Hole Wind

Microscopic black holes explode with their temperature varying inversely as their mass. Such explosions would lead to the highest temperatures in the present universe, all the way to the Planck energy. Whether or not a quasi-stationary shell of matter undergoing radial hydrodynamic expansion surrounds such black holes has been controversial. In this paper relativistic viscous fluid equations are applied to the problem. It is shown that a selfconsistent picture emerges of a fluid just marginally kept in local thermal equilibrium; viscosity is a crucial element of the dynamics. PACS numbers: 04.70.Dy, 11.10.Wx, 26.50.+x kapusta@physics.spa.umn.edu