Study of cosmic backreaction on the future evolution of an accelerating
  universe using multiple domains
  We investigate the effect of backreaction due to inhomogeneities on the
evolution of the present Universe by considering the Universe to be partitioned
into multiple domains within the Buchert framework. Taking the observed present
acceleration of the universe as an essential input, we study the effect of
inhomogeneities on the future evolution. We find that the backreaction from
inhomogeneities causes the acceleration to slow down in the future for a range
of initial configurations and model parameters, and even lead in certain cases
to the emergence of a future decelerating epoch. We consider two different
partitioning of the Universe and perform a comparative analysis for the two
cases on the behaviour of the acceleration and backreaction of the Universe.
