  We report the measurement of first (\textit{n} = 1) and higher
order(\textit{n} = 2-5) harmonic coefficients ($v_{n}$) of the azimuthal
anisotropy in the distribution of the particles produced in Au+Au collisions at
$\sqrt{s_{NN}}$ =200 GeV and U+U collisions at $\sqrt{s_{NN}}$ =193 GeV,
recorded with the STAR detector at RHIC. The differential measurement of
$(v_{n})$ is presented as a function of transverse momentum ($p_{T}$) and
centrality. We also present $v_{n}$ measurement in the ultra-central collisions
in U+U collisions. These data may provide strong constraints on the theoretical
models of the initial condition in heavy ion collisions and the transport
properties of the produced medium.
