Nonlinear Response of Bio-Polymers Subject to Stretching Flow with Thermal Noise

The dynamics of elastic filaments subject to hydrodynamic forces exhibits complex nonlinear dynamics in the neighborhood of stagnation points in the flow. Here, the motion of a single in-extensible bio-polymer with an-isotropic friction tensor subjected to a stretching flow is modeled with stochastic differential equations as well as dissipative particle dynamics simulations. Our results show that the negative tension induces a stretch-coil transition beyond a critical value, where the noise is amplificated due to the interaction between thermal noise and nonlinear effects.