  We study the effect of vorticity present in heavy ion collisions (HICs) on
the temperature evolution of hot quark-gluon plasma in the presence of
spin-vorticity coupling. The initial global rotation entails a nontrivial
dependence of the longitudinal flow velocity on the transverse coordinates and
also develops a transverse velocity component that depends upon the
longitudinal coordinate. Both of these velocities lead to a 2+1 dimensional
expansion of the fireball. It is observed that with finite vorticity and
spin-polarization the fireball cools faster as compared to the case without
vorticity. Furthermore, we discuss the consequence of this on the production of
thermal dileptons.
