Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
AbstractThe properties of a semiflexible polymer with fixed ends exposed to oscillatory shear flow are investigated by simulations. The two-dimensionally confined polymer is modeled as a linear bead-spring chain, and the interaction with the fluid is described by the Brownian multiparticle collision dynamics approach. For small shear rates, the tethering of the ends leads to a more-or-less linear oscillatory response. However, at high shear rates, we found a strongly nonlinear reaction, with a polymer (partially) wrapped around the fixation points. This leads to an overall shrinkage of the polymer. Dynamically, the location probability of the polymer center-of-mass position is largest on a spatial curve resembling a limaçon, although with an inhomogeneous distribution. We found shear-induced modifications of the normal-mode correlation functions, with a frequency doubling at high shear rates. Interestingly, an even-odd asymmetry for the Cartesian components of the correlation functions appears, with rather similar spectra for odd x- and even y-modes and vice versa. Overall, our simulations yielded an intriguing nonlinear behavior of tethered semiflexible polymers under oscillatory shear flow. View Full-Text
Share & Cite This Article
Lamura, A.; Winkler, R.G. Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear. Polymers 2019, 11, 737.
Lamura A, Winkler RG. Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear. Polymers. 2019; 11(4):737.Chicago/Turabian Style
Lamura, Antonio; Winkler, Roland G. 2019. "Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear." Polymers 11, no. 4: 737.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.