Imperfect fluid cosmologies with thermodynamics - Some exact solutions

The field equations for a viscous magnetohydrodynamic fluid satisfying an appropriate set of thermodynamic relations are investigated. It is shown that zero-curvature Friedmann-Robertson-Walker models can be exact solutions of this system of equations. Two types of solution are discussed: one in which the spacelike component of the tilting velocity vector is axially directed and the other in which the spacelike component is radially directed. The solutions presented satisfy all the necessary conditions for physical acceptability.