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This paper develops a computational framework coupling a moisture-induced cohesive force model with the Coarse-Grained Discrete Element Method (CG-DEM) to efficiently and accurately simulate the mixed discharge process of wet coal in a laboratory-scale three-dimensional silo. The moisture-induced cohesive force model quantifies the effect of moisture on coal flowability by correlating moisture content with macroscopic mechanical parameters of the particles (cohesion, internal friction angle). Simulation results indicate that particle flow exhibits a significant central-channeling "funnel flow" characteristic, and the flow structure is dominated by the flowability of the lower coal layer. The moisture-induced cohesive force is a key factor controlling particle motion. The study further reveals the decisive influence of stacking sequence on the evolution of outlet coal quality: when the lower layer consists of high-moisture, poor-flowability Indonesian coal, the outlet calorific value shows a slow rising trend; conversely, when the lower layer consists of good-flowability Longwanggou coal, the outlet calorific value decreases rapidly. This research provides a reliable, low-cost numerical tool for understanding and predicting the discharge and mixing behavior of wet coal in industrial silos, offering guidance for optimizing coal blending and stabilizing the quality of feed coal.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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