| Autor: |
Ajmal, Mohsin, Katterfeld, André |
| Předmět: |
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| Zdroj: |
EA National Conference Publications; 2023, p53-63, 11p |
| Abstrakt: |
Discrete element method (DEM) has established itself as an indispensable tool in development of material handling equipment. Simulation of a material by taking into consideration the actual particle size and topology is an astronomical computational task. Simplifications of the DEM material model parameters are therefore required which makes calibration of the DEM contact parameters by comparison with laboratory experiments a necessary step in every simulation project. Calibration strategies for free flowing and non-cohesive bulk solids are well developed, however development of standard calibration procedures for cohesive materials is an active research question. For biomass materials in which the prevailing cohesive mechanism is the interlocking effect between the fibrous structures there is even less research work according to the understanding of the authors. This paper tries to effectively develop a DEM modelling and calibration procedure for compost which is a difficult material to handle due to its highly heterogenous nature with a very high degree of interlocking between the various fractions of the material. The main goal is to simulate a highly dynamic compost turning process. An iterative calibration and validation approach was employed which gave useful insights into the flow behaviour of compost. Limiting the rotational degree of freedom in DEM and by using multispheres yielded satisfactory results. Extensive lab scale testing of the compost was undertaken and the draw down experiment with variable opening sizes produced reproducible results which could be used as basis for DEM calibration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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