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000862784 1001_ $$0P:(DE-Juel1)171524$$aMartín-Gómez, Aitor$$b0
000862784 245__ $$aActive Brownian filaments with hydrodynamic interactions: conformations and dynamics
000862784 260__ $$aLondon$$bRoyal Soc. of Chemistry$$c2019
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000862784 520__ $$aThe conformational and dynamical properties of active self-propelled filaments/polymers are investigated in the presence of hydrodynamic interactions by both, Brownian dynamics simulations and analytical theory. Numerically, a discrete linear chain composed of active Brownian particles is considered, analytically, a continuous linear semiflexible polymer with active velocities changing diffusively. The force-free nature of active monomers is accounted for—no Stokeslet fluid flow induced by active forces—and higher order hydrodynamic multipole moments are neglected. Hence, fluid-mediated interactions are assumed to arise solely due to intramolecular forces. The hydrodynamic interactions (HI) are taken into account analytically by the preaveraged Oseen tensor, and numerically by the Rotne–Prager–Yamakawa tensor. The nonequilibrium character of the active process implies a dependence of the stationary-state properties on HI via the polymer relaxation times. In particular, at moderate activities, HI lead to a substantial shrinkage of flexible and semiflexible polymers to an extent far beyond shrinkage of comparable free-draining polymers; even flexible HI-polymers shrink, while active free-draining polymers swell monotonically. Large activities imply a reswelling, however, to a less extent than for non-HI polymers, caused by the shorter polymer relaxation times due to hydrodynamic interactions. The polymer mean square displacement is enhanced, and an activity-determined ballistic regime appears. Over a wide range of time scales, flexible active polymers exhibit a hydrodynamically governed subdiffusive regime, with an exponent significantly smaller than that of the Rouse and Zimm models of passive polymers. Compared to simulations, the analytical approach predicts a weaker hydrodynamic effect. Overall, hydrodynamic interactions modify the conformational and dynamical properties of active polymers substantially.
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000862784 7001_ $$0P:(DE-Juel1)164141$$aEisenstecken, Thomas$$b1
000862784 7001_ $$0P:(DE-Juel1)130665$$aGompper, Gerhard$$b2$$eCorresponding author
000862784 7001_ $$0P:(DE-Juel1)131039$$aWinkler, Roland G.$$b3$$eCorresponding author
000862784 773__ $$0PERI:(DE-600)2191476-X$$a10.1039/C9SM00391F$$gVol. 15, no. 19, p. 3957 - 3969$$n19$$p3957 - 3969$$tSoft matter$$v15$$x1744-6848$$y2019
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000862784 8564_ $$uhttps://juser.fz-juelich.de/record/862784/files/self_prop_hydro.pdf$$yPublished on 2019-04-12. Available in OpenAccess from 2020-04-12.
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