In this talk, I compare two types of initial conditions for relativistic hydrodynamics in the context of RHIC energies: IP-Glasma and NEXUS, both of which have a non-zero initial flow. NEXUS has energy density and flow fluctuations that occur at the order of hadronic scales and, as such, a typical event contains broad energy density lumps and a well defined, cluster-like initial flow pattern. On the other hand, the IP-Glasma model has subnucleonic, gluon saturation-induced energy density and initial flow fluctuations, which lead to structure at much smaller scales than NEXUS. Using the v-USPhydro code which includes shear and bulk viscous effects, we investigate how the initial flow in these different sets of initial conditions affect the anisotropic flow harmonics computed event by event.
