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Probing density fluctuations in fluidized granular media with diffusing wave spectroscopy

Born, Philip and Reinhold, Steffen and Sperl, Matthias (2016) Probing density fluctuations in fluidized granular media with diffusing wave spectroscopy. Physical Review E, 94, 032901. American Physical Society. doi: 10.1103/PhysRevE.94.032901. ISSN 2470-0045.

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Official URL: http://dx.doi.org/10.1103/PhysRevE.94.032901


Density waves are characteristic for fluidized beds and affect measurements on liquidlike dynamics in fluidized granular media. Here the intensity autocorrelation function as obtainable with diffusing-wave spectroscopy is derived in the presence of density waves. The predictions by the derived form of the intensity autocorrelation function match experimental observations from a gas-fluidized bed. The model suggests separability of the contribution from density waves from the contribution by microscopic scatterer displacement to the decay of correlation and thus paves the way for characterizing microscopic particle motions using diffusing-wave spectroscopy as well as heterogeneities in fluidized granular media.

Item URL in elib:https://elib.dlr.de/110340/
Document Type:Article
Title:Probing density fluctuations in fluidized granular media with diffusing wave spectroscopy
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Born, PhilipPhilip.Born (at) dlr.deUNSPECIFIED
Sperl, MatthiasMatthias.Sperl (at) dlr.deUNSPECIFIED
Date:September 2016
Journal or Publication Title:Physical Review E
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1103/PhysRevE.94.032901
Page Range:032901
Publisher:American Physical Society
Keywords:light scattering, granular matter, diffusing-wave spectroscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Model systems
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Sperl, Matthias
Deposited On:09 Jan 2017 15:16
Last Modified:17 Mar 2021 13:40

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