%0 Journal Article
%A Lamura, Antonio
%A Winkler, Roland G.
%T Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
%J Polymers
%V 11
%N 4
%@ 2073-4360
%C Basel
%I MDPI
%M FZJ-2019-02749
%P 737
%D 2019
%X The 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
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:31018564
%U <Go to ISI:>//WOS:000467312900166
%R 10.3390/polym11040737
%U https://juser.fz-juelich.de/record/862433