Bulk Segregation in Rotated Granular Material Measured by Magnetic Resonance Imaging

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.50· OSTI ID:432547

Hill, K; Caprihan, A; Kakalios, J ^[1]; Caprihan, A ^[2]

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1. School of Physics and Astronomy, The University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. The Lovelace Institutes, 2425 Ridgecrest Drive SE, Albuquerque, New Mexico 87108 (United States)

Many mixtures of granular materials tend to segregate when tumbled in a rotating horizontal cylinder, with the different components separating into bands of relatively pure single concentration along the rotational axis. The use of magnetic resonance imaging (MRI) to study concentration variations within a mixture of different sized spheres segregated in this manner indicates a more complicated structure within the bulk than can be observed or even inferred from surface measurements. Moreover, when the rotation speed is reduced and the homogeneous mixed state appears to be restored on the surface, the MRI data reveals that the radially segregated state persists. {copyright} {ital 1996} {ital The American Physical Society}

• DOE Contract Number: FG03-93ER14316; FG22-94PC94248
• OSTI ID: 432547
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GRANULAR MATERIALS
IMAGES
MIXTURES
NMR SPECTRA
ROTATION
SEGREGATION