The flow angle fluctuation \Fpsi{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 $\eta/s(T)$ , iEBE-VISHNU with AMPT initial conditions and $\eta/s=0.08$  and $\eta/s=0.20$, CoLBT , and AMPT  are shown as coloured bands.