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Improvement in Precision, Accuracy, and Efficiency in Standardizing the Characterization of Granular Materials

[+] Author Affiliations
J. R. Tucker, L. J. Shadle, S. Benyahia, J. Mei, C. Guenther

National Energy Technology Laboratory, Morgantown, WV

M. E. Koepke

West Virginia University, Morgantown, WV

Paper No. IMECE2013-65027, pp. V07AT08A064; 9 pages
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 7A: Fluids Engineering Systems and Technologies
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5631-4
  • Copyright © 2013 by ASME


Useful prediction of the kinematics, dynamics, and chemistry of a system relies on precision and accuracy in the quantification of component properties, operating mechanisms, and collected data. In an attempt to emphasize, rather than gloss over, the benefit of proper characterization to fundamental investigations of multiphase systems incorporating solid particles, a set of procedures were developed and implemented for the purpose of providing a revised methodology having the desirable attributes of reduced uncertainty, expanded relevance and detail, and higher throughput. Better, faster, cheaper characterization of multiphase systems result.

Methodologies are presented to characterize particle size, shape, size distribution, density (particle, skeletal and bulk), minimum fluidization velocity, void fraction, particle porosity, and assignment within the Geldart Classification. A novel form of the Ergun equation was used to determine the bulk void fractions and particle density. Accuracy of properties-characterization methodology was validated on materials of known properties prior to testing materials of unknown properties. Several of the standard present-day techniques were scrutinized and improved upon where appropriate. Validity, accuracy, and repeatability were assessed for the procedures presented and deemed higher than present-day techniques.

A database of over seventy materials has been developed to assist in model validation efforts and future designs.

Copyright © 2013 by ASME



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