This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/22176 in citations.
Please use the identifier: http://dx.doi.org/10.3390/polym11040737 in citations.
Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
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 dynamic...
| Personal Name(s): | Lamura, Antonio |
|---|---|
| Winkler, Roland G. (Corresponding author) | |
| Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IAS-2 |
| Published in: | Polymers, 11 (2019) 4, S. 737 |
| Imprint: |
Basel
MDPI
2019
|
| DOI: |
10.3390/polym11040737 |
| PubMed ID: |
31018564 |
| Document Type: |
Journal Article |
| Research Program: |
Physical Basis of Diseases |
| Link: |
Get full text Get full text OpenAccess OpenAccess |
| Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.3390/polym11040737 in citations.
|
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 |