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Aspects of the density field in an active nematic
"... trends in active liquid crystals: mechanics, dynamics and applications’. Subject Areas: statistical physics Keywords: active matter, self-propelled systems, motility Author for correspondence: ..."
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trends in active liquid crystals: mechanics, dynamics and applications’. Subject Areas: statistical physics Keywords: active matter, self-propelled systems, motility Author for correspondence:
Mechanisms of Carrier Transport Induced by a
"... Abstract—It was shown that a wedgelike microparticle (referred to as “carrier”) exhibits a directed translational motion along the wedge cusp if it is exposed to a bath of microswimmers. Here we model this effect in detail by resolving the microswimmers explic-itly using interactionmodels with diffe ..."
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Abstract—It was shown that a wedgelike microparticle (referred to as “carrier”) exhibits a directed translational motion along the wedge cusp if it is exposed to a bath of microswimmers. Here we model this effect in detail by resolving the microswimmers explic-itly using interactionmodels with different degrees ofmutual align-ment. Using computer simulations we study the impact of these in-teractions on the transport efficiency of a V-shaped carrier. We show that the transport mechanism itself strongly depends on the degree of alignment embodied in the modeling of the individual swimmer dynamics. For weak alignment, optimal carrier trans-port occurs in the turbulent microswimmer state and is induced by swirl depletion inside the carrier. For strong aligning interac-tions, optimal transport occurs already in the dilute regime and is mediated by a polar cloud of swimmers in the carrier wake pushing the wedge-particle forward. We also demonstrate that the optimal shape of the carrier leading to maximal transport speed depends on the kind of interaction model used. Index Terms—Computational modeling, dynamics, micromotor, microorganisms, nanobioscience, physics. I.
systems describing pedestrian flows
"... effect of perception anisotropy on particle ..."
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