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Drop tower setup for dynamic light scattering in dense gas-fluidized granular media

Born, Philip and Bussmann, Michael and Schmitz, Johannes and Sperl, Matthias (2016) Drop tower setup for dynamic light scattering in dense gas-fluidized granular media. Microgravity Science and Technology, 28 (4), pp. 413-420. Springer. DOI: 10.1007/s12217-016-9496-7 ISSN 0938-0108

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Official URL: http://dx.doi.org/10.1007/s12217-016-9496-7

Abstract

Investigation of dynamics in dense granular media is challenging. Here we present a setup that facilitates gas fluidization of dense granular media in microgravity. The dynamics is characterized using diffusing wave spectroscopy. We demonstrate that agitated granular media reach a steady state within fractions of a second in drop tower flights. The intensity autocorrelation functions obtained in microgravity show a remarkable dependence on sample volume fraction and driving strength. A plateau in correlation emerges at low volume fractions and strong driving, while correlation decays only very slowly but continuously at high packing fractions. The setup allows to independently set sample volume fraction and driving strength, and thus extends the possibilities for investigations on dynamics in dense granular on ground.

Item URL in elib:https://elib.dlr.de/110334/
Document Type:Article
Title:Drop tower setup for dynamic light scattering in dense gas-fluidized granular media
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Born, PhilipG.UNSPECIFIED
Bussmann, MichaelUNSPECIFIEDUNSPECIFIED
Schmitz, JohannesUNSPECIFIEDUNSPECIFIED
Sperl, MatthiasMatthias.Sperl (at) dlr.deUNSPECIFIED
Date:August 2016
Journal or Publication Title:Microgravity Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:28
DOI :10.1007/s12217-016-9496-7
Page Range:pp. 413-420
Publisher:Springer
ISSN:0938-0108
Status:Published
Keywords:dynamic light scattering, microgravity, granular matter
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Modellsysteme
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:10 Jan 2019 15:49

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