Rheometry of Cohesive Powder Flow
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- GHADIRI Mojtaba
- Professor, School of Chemical and Process Engineering, University of Leeds, UK
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- MATSUSAKA Shuji
- Professor, Graduate School of Engineering, Kyoto University, JAPAN
Bibliographic Information
- Other Title
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- 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
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- THE MICROMERITICS
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THE MICROMERITICS 63 (0), 3-12, 2019-12-15
Hosokawa Micron Corporation
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Details 詳細情報について
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- CRID
- 1390283659828196352
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- NII Article ID
- 130007761300
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- ISSN
- 24322075
- 04299051
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Allowed