The effective granular temperature based on the fluctuation-dissipation theorem

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dc.contributor.advisorSwinney, H.L., 1939-
dc.creatorBuck, Alexander, 1983-
dc.date.accessioned2016-12-13T16:03:37Z
dc.date.accessioned2018-01-22T22:31:12Z
dc.date.available2016-12-13T16:03:37Z
dc.date.available2018-01-22T22:31:12Z
dc.date.issued2007-08
dc.description.abstractDissipative granular systems that are driven continuously by an external forcing, like vertical shaking or fluid flow pulses, exhibit fluid like properties. Different definitions of granular temperature have been proposed for these systems, in analogy to regular fluids of microscopic particles. On the road to creating a setup for measuring both the temperature based on the fluctuation-dissipation theorem TFD and the kinetic temperature Tkin, experiments to measure TFD of a water-fluidized bed of glass beads (d = 250 μm) were performed with a torsion oscillator. For low flow rates around the onset of fluidization, (flow rate Q ∼ 0.30 ml/s) the temperature was on the order of kBTFD ∼ 10−16 J and showed a linear increase with the flow rate. A sharp increase of the damping of the torsion oscillator was found for decreasing flow rates around the onset of fluidization, which can be interpreted as the approach to a glassy regime of the fluidized bed.en_US
dc.description.departmentPhysicsen_US
dc.format.mediumelectronicen_US
dc.identifierdoi:10.15781/T2VH5CM8C
dc.identifier.urihttp://hdl.handle.net/2152/43959
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en_US
dc.rights.restrictionRestricteden_US
dc.subjectFluid dynamicsen_US
dc.subjectNonlinear mechanicsen_US
dc.subjectDissipative granular systemsen_US
dc.titleThe effective granular temperature based on the fluctuation-dissipation theoremen_US
dc.typeThesisen_US
dc.type.genreThesisen_US

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