  The non-equilibrium structural and dynamical properties of a flexible polymer
tethered to a reflecting wall and subject to oscillatory linear flow are
studied by numerical simulations. Polymer is confined in two dimensions and is
modeled as a bead-spring chain immersed in a fluid described by the Brownian
multiparticle collision dynamics. At high strain, the polymer is stretched
along the flow direction following the applied flow, then recoils at flow
inversion before flipping and elongate again. When strain is reduced, it may
happen that the chain recoils without flipping when the applied shear changes
sign. Conformations are analyzed and compared to stiff polymers revealing more
compact patterns at low strains and less stretched configurations at high
strain. The dynamics is investigated by looking at the center-of-mass motion
which shows a frequency doubling along the direction normal to the external
flow. The center-of-mass correlation function is characterized by smaller
amplitudes when reducing bending rigidity.
