  A new class of analytic, exact, rotating, self-similar and surprisingly
simple solutions of non-relativistic hydrodynamics are presented for a
three-dimensionally expanding, spheroidally symmetric fireball. These results
generalize earlier, non-rotating solutions for ellipsoidally symmetric
fireballs with directional, three-dimensional Hubble flows. The solutions are
presented for a general class of equations of state that includes the lattice
QCD equations of state and may feature inhomogeneous temperature and
corresponding density profiles.
