Fluctuations and initial state granularity in heavy ion collisions and   their effects on observables from hydrodynamics
  A comparison is made between results obtained using smooth initial conditions and event-by-event initial conditions in the hydrodynamical description of relativistic nuclear collisions. Some new results on directed flow are also included. 
R.P.G.Andrade, A.L.V.R.dos Reis, F.Grassi, Y.Hama, W.L.Qian, T.Kodama   and J.-Y.Ollitrault