Anisotropic Flow Measurements at RHIC

Anisotropic flow measurements in relativistic-heavy ion collisions at RHIC-BNL and LHC-CERN have provided strong evidence for the formation of a strongly coupled Quark-Gluon Plasma (sQGP). In this article, we briefly review and discuss the recent results of anisotropic flow measurements from the STAR and PHENIX experiments at RHIC, such as 1) new measurements at top RHIC energy root S-NN=200 GeV, 2) collective effects in small and large colliding systems, 3) current results and their understanding from the first beam energy scan program at RHIC (BES-I) and future plans for the BES-II program.