Pebble flow in the HTR-PM reactor core by GPU-DEM simulation: Effect of friction Article Swipe
Zuoyi Zhang
,
Quan Zou
,
Nan Gui
,
Bing Xia
,
Zhiyong Liu
,
Xingtuan Yang
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1016/j.net.2024.04.032
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1016/j.net.2024.04.032
The high-temperature gas-cooled reactor (HTGR) with spherical fuel elements contains complex pebble flow. The flow behavior of pebbles is influenced by various factors, such as pebble density, friction coefficient, wall structure, and discharge port size. Using a GPU-DEM numerical model, the effects of the friction coefficient on the cyclic loading and unloading of pebbles in the full-scale HTR-PM are studied. Numerical simulations with up to 420,000 spherical pebbles are conducted. Four sets of friction coefficient values are determined for comparative analysis based on experimental measurements. Discharging speed, residence time, stress, porosity, and velocity distribution are quantitatively analyzed. In addition, a comparison with the CT-PFD experiment is carried out to validate the numerical model. The results show that near-wall retention phenomena are observed in the reactor core only when using large friction coefficients. However, using friction coefficient values closer to the measured experimental values, the pebble bed in HTR-PM exhibited good flow characteristics. Furthermore, the friction coefficient also influences the porosity and velocity distribution of the pebble bed, with lower friction coefficients resulting in lower overall stress in the bed. The discharge outlet's influence varies with different friction coefficient values. In summary, this study demonstrates that the value of the friction coefficient has a complex influence on the pebble flow in HTR-PM, which provides important insights for future numerical and experimental studies in this field.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1016/j.net.2024.04.032
- OA Status
- diamond
- Cited By
- 6
- References
- 45
- Related Works
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- OpenAlex ID
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All OpenAlex metadata
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https://openalex.org/W4395670628Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1016/j.net.2024.04.032Digital Object Identifier
- Title
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Pebble flow in the HTR-PM reactor core by GPU-DEM simulation: Effect of frictionWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-04-26Full publication date if available
- Authors
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Zuoyi Zhang, Quan Zou, Nan Gui, Bing Xia, Zhiyong Liu, Xingtuan YangList of authors in order
- Landing page
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https://doi.org/10.1016/j.net.2024.04.032Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
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diamondOpen access status per OpenAlex
- OA URL
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https://doi.org/10.1016/j.net.2024.04.032Direct OA link when available
- Concepts
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Pebble, Materials science, Mechanics, Porosity, Flow (mathematics), Discharge coefficient, Core (optical fiber), Friction coefficient, Discrete element method, Computer simulation, Composite material, Thermodynamics, Physics, Geology, Geomorphology, NozzleTop concepts (fields/topics) attached by OpenAlex
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6Total citation count in OpenAlex
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2025: 4, 2024: 2Per-year citation counts (last 5 years)
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