Tumbling, stretching and cross-stream migration of polymers in rectilinear shear flow from dissipative particle dynamics simulations

► We investigated through simulation Couette flow of polymer solutions in nanoscale channels. ► The study generalized dissipative particle dynamics with relatively high Schmidt number. ► Cross-stream migration towards the channel centerline is observed. ► The polymers exhibit stretching and tumbling with angular distributions exhibiting power-law decay. ► Tumbling kinetics of polymers is weakly periodic.