The flow magnitude fluctuation \Fvn{2} in \PbPb collisions at \snn = 5.02 TeV as a function of the associate particle transverse momentum, \pta, in centrality classes 0--5\% (left), 10--20\% (middle), and 30--40\% (right). Comparison with iEBE-VISHNU with \trento initial conditions and $\eta/s(T)$ , MUSIC with Glauber initial conditions and $\eta/s=0.08$ , MUSIC with \trento initial conditions and $\eta/s=0.08,0.12,0.16$ , and AMPT  are shown as coloured bands.