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CFD-DEM Coupled Simulation of Pneumatic Conveying Pipelines for Uranium Dioxide Particles
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Wujiang ZHOU1, Jian DENG1, Jieheng LEI2, Zeyong LEI1, Wenxue YANG1
Uranium Mining and Metallurgy | 2026, 45(2) : 116 - 124
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Uranium Mining and Metallurgy | 2026, 45(2): 116-124
• Mining and Hydrometallurgy •
CFD-DEM Coupled Simulation of Pneumatic Conveying Pipelines for Uranium Dioxide Particles
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Wujiang ZHOU1, Jian DENG1, Jieheng LEI2, Zeyong LEI1, Wenxue YANG1
Affiliations
  • 1.School of Mechanical Engineering, University of South China, Hengyang 421001, China
  • 2.School of Electrical Engineering, University of South China, Hengyang 421001, China
Published: 2026-05-20 doi: 10.13426/j.cnki.yky.2025.10.06
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To address pipeline blockage issues in the negative-pressure pneumatic conveying of uranium dioxide at a uranium company, this study employed a combined approach of CFD-DEM coupled simulation and field experiments. By examining particle flow patterns, gas-phase pressure distribution, and system pressure drop, the underlying mechanism of pipeline blockage was elucidated. The validity of the simulation model was confirmed through comparative analysis of field measurements and numerical results. The findings demonstrate that increasing the elbow curvature radius from 200 mm to 500 mm and the bend diameter ratio from 2.50 to 6.25 significantly reduced local pressure losses during conveying. As a result, particle flow stability improved, with the peak gas-phase pressure dropping to 27.2 kPa and the overall system pressure drop decreasing markedly, thereby restoring normal operation of the power equipment. This study verifies the reliability of the CFD-DEM model for optimizing the pneumatic conveying system of uranium dioxide particles, offering both theoretical support and practical guidance for achieving efficient and stable transport.

uranium dioxide  /  pneumatic conveying  /  numerical simulation  /  particle dynamics  /  wear prediction
周伍江, 邓健, 雷洁珩, 雷泽勇, 杨文学. 二氧化铀颗粒气力输送管道的CFD-DEM耦合模拟. 铀矿冶, 2026 , 45 (2) : 116 -124 . DOI: 10.13426/j.cnki.yky.2025.10.06
Wujiang ZHOU, Jian DENG, Jieheng LEI, Zeyong LEI, Wenxue YANG. CFD-DEM Coupled Simulation of Pneumatic Conveying Pipelines for Uranium Dioxide Particles[J]. Uranium Mining and Metallurgy, 2026 , 45 (2) : 116 -124 . DOI: 10.13426/j.cnki.yky.2025.10.06
Appendix
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Year 2026 volume 45 Issue 2
91
19
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Article Info
doi: 10.13426/j.cnki.yky.2025.10.06
  • Receive Date：2025-10-25
  • Online Date：2026-09-28
  • Published：2026-05-20
Article Data
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History
  • Received：2025-10-25
  • Revised：2025-11-05
Affiliations
    1.School of Mechanical Engineering, University of South China, Hengyang 421001, China
    2.School of Electrical Engineering, University of South China, Hengyang 421001, China
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表12种不同金属材料的力学参数
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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