Long-term influence of fluid inertia on the diffusion of a Brownian particle

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dc.citation.epage042309-5en_US
dc.citation.issueNumber4en_US
dc.citation.spage042309-1en_US
dc.citation.volumeNumber90en_US
dc.contributor.authorPesce, G.en_US
dc.contributor.authorVolpe, G.en_US
dc.contributor.authorVolpe, G.en_US
dc.contributor.authorSasso, A.en_US
dc.date.accessioned2016-02-08T10:40:32Z
dc.date.available2016-02-08T10:40:32Z
dc.date.issued2014en_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractWe experimentally measure the effects of fluid inertia on the diffusion of a Brownian particle at very long time scales. In previous experiments, the use of standard optical tweezers introduced a cutoff in the free diffusion of the particle, which limited the measurement of these effects to times comparable with the relaxation time of the fluid inertia, i.e., a few milliseconds. Here, by using blinking optical tweezers, we detect these inertial effects on time scales several orders longer up to a few seconds. The measured mean square displacement of a freely diffusing Brownian particle in a liquid shows a deviation from the Einstein-Smoluchowsky theory that diverges with time. These results are consistent with a generalized theory that takes into account not only the particle inertia but also the inertia of the surrounding fluid. © 2014 American Physical Society.en_US
dc.identifier.doi10.1103/PhysRevE.90.042309en_US
dc.identifier.issn2470-0045
dc.identifier.urihttp://hdl.handle.net/11693/25181
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevE.90.042309en_US
dc.source.titlePhysical Review Een_US
dc.subjectBrownian particlesen_US
dc.subjectInfluence of fluiden_US
dc.subject07.10.Pzen_US
dc.subject47.15.G−en_US
dc.titleLong-term influence of fluid inertia on the diffusion of a Brownian particleen_US
dc.typeArticleen_US

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