  We describe ultra-relativistic heavy ion collisions at RHIC and the LHC with
a hybrid model using the IP-Glasma model for the earliest stage and viscous
hydrodynamics and microscopic transport for the later stages of the collision.
We demonstrate that within this framework the bulk viscosity of the plasma
plays an important role in describing the experimentally observed radial flow
and azimuthal anisotropy simultaneously. We further investigate the dependence
of observables on the temperature below which we employ the microscopic
transport description.
