Rolling friction measurement of slightly non-spherical particles using direct experiments and image analysis
| Autor: | Arijit Chakrabarty, Aman Tripathi, Anurag Tripathi, Vimod Kumar, Arpit Agarwal, Samik Nag |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.product_category Astm standard Rolling resistance 0211 other engineering and technologies General Physics and Astronomy 02 engineering and technology Mechanics 01 natural sciences Measure (mathematics) Image (mathematics) Mechanics of Materials Position (vector) 0103 physical sciences Particle-size distribution Calibration General Materials Science Inclined plane 010306 general physics business 021101 geological & geomatics engineering |
| Zdroj: | Granular Matter. 23 |
| ISSN: | 1434-7636 1434-5021 |
| Popis: | In absence of any direct measurement method of rolling friction for particles that deviate from perfectly spherical shape, most DEM simulation studies use bulk calibration approach to estimate an acceptable value of this parameter. A novel method based on image analysis of static grains is proposed to calculate the rolling friction coefficient of particles that deviate slightly from the spherical shape. To compare these values obtained from image analysis, direct measurement of the rolling friction coefficient of industrial pellet particles of slightly non-spherical shape is done using two different methods. The first method involves video analysis to track the position of particles rolling over an inclined plane. The second method proposes modifications to the ASTM standard method of rolling friction measurement of spherical particles to enable measurements for slightly non-spherical particles. Results obtained from the image analysis method are found to be in very good agreement with directly measured rolling friction values. Following this approach, it is possible to measure the rolling friction coefficient of particles using image analysis in a manner similar to measuring the particle size distribution. The image analysis method can be utilised for rolling friction estimation in situations where direct measurement is not possible and has potential for wide usage in DEM simulations of the powders and bulk solids. |
| Databáze: | OpenAIRE |
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