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Born, Philip und Bussmann, Michael und Schmitz, Johannes und Sperl, Matthias (2016) Drop tower setup for dynamic light scattering in dense gas-fluidized granular media. Microgravity Science and Technology, 28 (4), Seiten 413-420. Springer. doi: 10.1007/s12217-016-9496-7. ISSN 0938-0108.
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Offizielle URL: http://dx.doi.org/10.1007/s12217-016-9496-7
Kurzfassung
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.
| elib-URL des Eintrags: | https://elib.dlr.de/110334/ | ||||||||||||||||||||
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| Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
| Titel: | Drop tower setup for dynamic light scattering in dense gas-fluidized granular media | ||||||||||||||||||||
| Autoren: |
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| Datum: | August 2016 | ||||||||||||||||||||
| Erschienen in: | Microgravity Science and Technology | ||||||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||||||
| Open Access: | Nein | ||||||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||||||
| In SCOPUS: | Ja | ||||||||||||||||||||
| In ISI Web of Science: | Ja | ||||||||||||||||||||
| Band: | 28 | ||||||||||||||||||||
| DOI: | 10.1007/s12217-016-9496-7 | ||||||||||||||||||||
| Seitenbereich: | Seiten 413-420 | ||||||||||||||||||||
| Verlag: | Springer | ||||||||||||||||||||
| ISSN: | 0938-0108 | ||||||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||||||
| Stichwörter: | dynamic light scattering, microgravity, granular matter | ||||||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
| HGF - Programm: | Raumfahrt | ||||||||||||||||||||
| HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||||||||||
| DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||
| DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | R - Modellsysteme | ||||||||||||||||||||
| Standort: | Köln-Porz | ||||||||||||||||||||
| Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | ||||||||||||||||||||
| Hinterlegt von: | Sperl, Matthias | ||||||||||||||||||||
| Hinterlegt am: | 09 Jan 2017 15:16 | ||||||||||||||||||||
| Letzte Änderung: | 14 Nov 2023 12:46 |
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