Hydrodynamic interactions enhance the performance of Brownian ratchets

dc.contributor.authorGrimm, Andrej
dc.contributor.authorStark, Holger
dc.date.accessioned2016-06-30T06:33:34Z
dc.date.available2016-06-30T06:33:34Z
dc.date.issued2011
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractWe investigate how hydrodynamic interactions between Brownian particles influence the performance of a fluctuating ratchet. For this purpose, we perform Brownian dynamics simulations of particles that move in a toroidal trap under the influence of a sawtooth potential which fluctuates between two states (on and off). Hydrodynamic interactions are included in the Rotne-Prager approximation. We first consider spatially constant transition rates between the two ratchet states and observe that hydrodynamic interactions significantly increase the mean velocity of the particles but only when they are allowed to change their ratchet states individually. If in addition the transition rate to the off state is localized at the minimum of the ratchet potential, particles form characteristic transient clusters that travel with remarkably high velocities. The clusters form since drifting particles have the ability to push but also pull neighboring particles due to hydrodynamic interactions.en
dc.description.sponsorshipDFG, GRK 1558, Kollektive Dynamik im Nichtgleichgewicht: in kondensierter Materie und biologischen Systemenen
dc.identifier.eissn1744-6848
dc.identifier.issn1744-683X
dc.identifier.urihttp://depositonce.tu-berlin.de/handle/11303/5728
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-5348
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc530 Physikde
dc.titleHydrodynamic interactions enhance the performance of Brownian ratchetsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c0sm01085e
dcterms.bibliographicCitation.issue7
dcterms.bibliographicCitation.journaltitleSoft matteren
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend3227
dcterms.bibliographicCitation.pagestart3219
dcterms.bibliographicCitation.volume7
tub.accessrights.dnbdomain
tub.affiliationFak. 2 Mathematik und Naturwissenschaften>Inst. Theoretische Physikde
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.instituteInst. Theoretische Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlin
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