Elliptic and Triangular Flow in Event-by-Event D=3+1 Viscous Hydrodynamics

We present results for the elliptic and triangular flow coefficients upsilon(2) and upsilon(3) in Au + Au collisions at root s = 200 AGeV using event-by-event D = 3 + 1 viscous hydrodynamic simulations. We study the effect of initial state fluctuations and finite viscosities on the flow coefficients upsilon(2) and upsilon(3) as functions of transverse momentum and pseudorapidity. Fluctuations are essential to reproduce the measured centrality dependence of elliptic flow. We argue that simultaneous measurements of upsilon(2) and upsilon(3) can determine eta/s more precisely.