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BP: Fachverband Biologische Physik
BP 3: Computational Biophysics I
BP 3.10: Vortrag
Montag, 17. März 2025, 12:15–12:30, H44
Activity enhanced shear-thinning of flexible linear polar polymers — •Arindam Panda1, Roland G. Winkler2, and Sunil P Singh1 — 1Indian Institute Of Science Education and Research, Bhopal, Madhya Pradesh, India — 2Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich, Germany
The rheological behavior of tangentially propelled flexible polymers in linear shear flow is investigated through computer simulations and compared with analytical predictions. Our study reveals a significant interplay between nonequilibrium active forces and shear-induced effects on the polymer’s structural and dynamical properties. Polar activity enhances the shear-induced stretching along the flow direction while inducing compression in the transverse direction. This coupling leads to a pronounced shear-thinning response, where the viscosity decreases with increasing shear rate. In the high activity and shear limit, the polymer’s behavior becomes largely independent of the active forces, with the shear flow predominantly driving the system’s response. At asymptotically high shear rates, the system transitions to a regime where the polymer exhibits characteristics akin to passive polymers, with shear forces entirely overshadowing the influence of activity.
Keywords: polymer; shear; activity; nonequilibrium; rheological