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  Coarsening of axial segregation patterns of slurries in a horizontally rotation drum

Finger, T., Voigt, A., Stadler, J., Niessen, H., Naji, L., & Stannarius, R. (2006). Coarsening of axial segregation patterns of slurries in a horizontally rotation drum. Physical Review E, 74, 031312. doi:10.1038/nphys881.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-9B0F-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-F8E5-0
Genre: Journal Article

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 Creators:
Finger, T.1, Author
Voigt, A.2, 3, Author              
Stadler, J.1, Author
Niessen, H.1, Author
Naji, L.1, Author
Stannarius, R.1, Author
Affiliations:
1Otto-von-Guericke-University, Institute of Experimental Physics, Universitätsplatz 2, D-39106 Magdeburg, GermanyLeibniz Institute for Neurobiology, Brenneckestraße 6, D-39118 Magdeburg, GermanyCenter of Advanced Imaging (CAI) and Department of Neurology II, Otto-von-Guericke-University, Leipziger Straße 44, D-39120 Magdeburg, Germany, ou_persistent22              
2Process Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738151              
3Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              

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 Abstract: Segregation structures of granular mixtures in rotating drums represent classical examples of pattern formation in granular material. We investigate the coarsening of axial segregation patterns of slurries in a long horizontally rotating cylinder. The dynamics and the three-dimensional geometry of the segregation structures are analyzed with optical methods and nuclear magnetic resonance imaging. Previous studies have mainly considered global statistical features of the pattern dynamics. In order to get insight into driving mechanisms for the coarsening process, we focus on the details of the dissolution of individual bands. We treat the coarsening as a consequence of interactions of adjacent bands in the pattern, which are determined by their geometrical relations. In addition to initially homogeneous mixtures, which evolve to spontaneously formed patterns, we study the evolution of specially prepared simple initial states. The role of the three-dimensional geometry of the axial core in the dissolution process of segregation bands is demonstrated. Relations between geometry and dynamic processes are established, which may help to find the correct microscopic models for the coarsening mechanism.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 292769
DOI: 10.1038/nphys881
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Title: Physical Review E
Source Genre: Journal
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Pages: - Volume / Issue: 74 Sequence Number: - Start / End Page: 031312 Identifier: -