Nuclear magnetic resonance studies of granular flows. Technical progress report for the quarter ending June 30, 1994
In this project, the authors report the application of nuclear magnetic resonance (NMR) to granular flows. In particular, flows of granular materials in a partially filled, horizontal, rotating cylinder (rotating drum or a kiln), have been studied by NMR to yield not only the velocity and concentration fields, but also the diffusions coefficient components which are related to the velocity fluctuations. The velocity is measured from phase images whereas the concentration is measured from amplitude images by an imaging sequence containing flow compensation plus appropriate corrections for intensity attenuation caused by diffusion. Experiments with two solid phases yielding different NMR signals can be used to study mixing/demixing phenomena such as segregation; the authors have imaged radial segregation of a mixture of mustard seeds with glass beads of identical sizes but different densities. Progress to date is described briefly.
- Research Organization:
- Lovelace Insts., Albuquerque, NM (United States)
- DOE Contract Number:
- AC22-90PC90184
- OSTI ID:
- 10188146
- Report Number(s):
- DOE/PC/90184-T15; ON: DE95001167; BR: AA1510050; TRN: AHC29425%%33
- Resource Relation:
- Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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