  Effects of multi-gradient fields on the transport of a polymer chain have
been investigated by using generalized Langevin dynamics simulations. We
observe that the natural frequency of tumbling follows $Wi^{0.66}$ scaling,
where $Wi$ is the Weissenberg number. Analysis of angular tumbling time
distribution reveals that the tail of distribution follows exponential
distribution and at high Weissenberg number, deviates from Poisson behaviour.
Competition between velocity gradient which results shear flow in the system,
and solvent quality gradient arising due to the interaction among monomers
revealed that there is another scaling associated with the angular tumbling
time distribution. Moreover, at low temperature, we observe unusual behaviour
that at intermediate shear rates, decay rate $\nu$ decreases with $Wi$.

Soft Condensed Matter