Rheometry of Cohesive Powder Flow

DOI
  • GHADIRI Mojtaba
    Professor, School of Chemical and Process Engineering, University of Leeds, UK
  • MATSUSAKA Shuji
    Professor, Graduate School of Engineering, Kyoto University, JAPAN

Bibliographic Information

Other Title
  • 凝集性粉体流のレオメトリー

Description

<p>Powder processing and manufacturing operations are rate processes for which the bottleneck is cohesive powder flow.  Diversity of material properties and sensitivity to environmental conditions, such as humidity and tribo-electric charging, make its prediction very challenging, but highly desirable particularly when addressing a powder material for which only a small quantity is available.  Furthermore, in a number of applications powder flow testing at low stress levels is highly desirable.  Characterisation of bulk failure for flow initiation (quasi-static) of such powders is well established. However, bulk flow parameters are all sensitive to the speed with which the powder is sheared, but in contrast to quasi-static test methods, there is no shear cell for characterisation of bulk flow parameters in the dynamic regime.  There are only a handful of instruments available for powder rheometry, in which the bulk resistance to motion can be quantified as a function of shear strain rate, but the challenge is relating the behaviour to the physical and mechanical properties of the constitutive particles.  A critique of the current state of the art in rheometry of cohesive powder flow is presented, reviewing features of a number of widely used instruments. </p>

Journal

  • THE MICROMERITICS

    THE MICROMERITICS 63 (0), 3-12, 2019-12-15

    Hosokawa Micron Corporation

Details 詳細情報について

  • CRID
    1390283659828196352
  • NII Article ID
    130007761300
  • DOI
    10.24611/micromeritics.2020005
  • ISSN
    24322075
    04299051
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Allowed

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