TY  - JOUR
AU  - Lamura, Antonio
AU  - Winkler, Roland G.
TI  - Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
JO  - Polymers
VL  - 11
IS  - 4
SN  - 2073-4360
CY  - Basel
PB  - MDPI
M1  - FZJ-2019-02749
SP  - 737
PY  - 2019
AB  - 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
LB  - PUB:(DE-HGF)16
C6  - pmid:31018564
UR  - <Go to ISI:>//WOS:000467312900166
DO  - DOI:10.3390/polym11040737
UR  - https://juser.fz-juelich.de/record/862433
ER  -