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Issue 16, 2016
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Dynamics of flexible active Brownian dumbbells in the absence and the presence of shear flow

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Abstract

The dynamical properties of a flexible dumbbell composed of active Brownian particles are analytically analyzed. The dumbbell is considered as a simplified description of a linear active polymer. The two beads are independently propelled in directions which change in a diffusive manner. The relaxation behavior of the internal degree of freedom is tightly coupled to the dumbbell activity. The latter dominates the dynamics for strong propulsion. As is shown, limitations in bond stretching strongly influence the relaxation behavior. Similarly, under shear flow, activity determines the relaxation and tumbling behavior at strong propulsion. Moreover, shear leads to a preferred alignment and consequently to shear thinning. Thereby, a different power-law dependence on the shear rate compared to passive dumbbells under flow is found.

Graphical abstract: Dynamics of flexible active Brownian dumbbells in the absence and the presence of shear flow

  • This article is part of the themed collection: Polymers
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Publication details

The article was received on 08 Dec 2015, accepted on 26 Feb 2016 and first published on 01 Mar 2016


Article type: Paper
DOI: 10.1039/C5SM02965A
Citation: Soft Matter, 2016,12, 3737-3749
  • Open access: Creative Commons BY license
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    Dynamics of flexible active Brownian dumbbells in the absence and the presence of shear flow

    R. G. Winkler, Soft Matter, 2016, 12, 3737
    DOI: 10.1039/C5SM02965A

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