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Dynamic behavior of eccentric discharging in the underground grain silo based on discrete element method.

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Title: Dynamic behavior of eccentric discharging in the underground grain silo based on discrete element method.
Authors: Wang, Xu1,2 (AUTHOR), Jin, Li-bing1,3 (AUTHOR) jinlb@haut.edu.cn, Zhu, Dou-dou1 (AUTHOR), Zhang, Jing-jin1 (AUTHOR), Wu, Qiang1 (AUTHOR), Wang, Zhen-qing3 (AUTHOR)
Source: Granular Matter. Apr2026, Vol. 28 Issue 2, p1-17. 17p.
Subjects: Discrete element method, Particle dynamics analysis, Grain storage, Silos, Dynamic pressure, Structural design, Computer simulation
Abstract: Underground grain squat silos offer a series of advantages, including energy saving, low carbon emissions, and environmental protection, which are of great significance in the context of food security. To investigate the behavior of particle dynamics and the dynamic response between the silo and particles in the underground grain squat silo during eccentric discharge, a combination of numerical simulation and theoretical analysis was employed. A mathematical model was constructed using the discrete element method, and a comparison with Janssen's theory corroborated its validity. The particle dynamics behavior of eccentric discharge was examined through the established numerical model, with a view to elucidating the variations in dynamic pressure, particle contact stress, velocity, and angular velocity that occur under eccentric discharge conditions. The results demonstrate that: (1) The dynamic pressure and overpressure coefficients exhibit variation in different directions during eccentric discharge, with a gradual decrease observed with increasing discharge hole. (2) The incorporation of a central cylinder introduces a more intricate flow path for the particles during the discharge process. As the number of discharge hole increases, the flow path of the particles extends in length, and the velocity of the particles gradually increases, while the angular velocity and contact stress gradually decrease. (3) The displacement of the silo is relatively minor and diminishes as the quantity of discharge apertures rises. This paper offers a theoretical reference for the optimization of the structural design, grain discharge process, and overall performance of underground grain squat silos. [ABSTRACT FROM AUTHOR]
Copyright of Granular Matter is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192481930
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Dynamic behavior of eccentric discharging in the underground grain silo based on discrete element method.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Xu%22">Wang, Xu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+Li-bing%22">Jin, Li-bing</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> jinlb@haut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Dou-dou%22">Zhu, Dou-dou</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jing-jin%22">Zhang, Jing-jin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Qiang%22">Wu, Qiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhen-qing%22">Wang, Zhen-qing</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Granular+Matter%22">Granular Matter</searchLink>. Apr2026, Vol. 28 Issue 2, p1-17. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Discrete+element+method%22">Discrete element method</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+dynamics+analysis%22">Particle dynamics analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+storage%22">Grain storage</searchLink><br /><searchLink fieldCode="DE" term="%22Silos%22">Silos</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+pressure%22">Dynamic pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+design%22">Structural design</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Underground grain squat silos offer a series of advantages, including energy saving, low carbon emissions, and environmental protection, which are of great significance in the context of food security. To investigate the behavior of particle dynamics and the dynamic response between the silo and particles in the underground grain squat silo during eccentric discharge, a combination of numerical simulation and theoretical analysis was employed. A mathematical model was constructed using the discrete element method, and a comparison with Janssen's theory corroborated its validity. The particle dynamics behavior of eccentric discharge was examined through the established numerical model, with a view to elucidating the variations in dynamic pressure, particle contact stress, velocity, and angular velocity that occur under eccentric discharge conditions. The results demonstrate that: (1) The dynamic pressure and overpressure coefficients exhibit variation in different directions during eccentric discharge, with a gradual decrease observed with increasing discharge hole. (2) The incorporation of a central cylinder introduces a more intricate flow path for the particles during the discharge process. As the number of discharge hole increases, the flow path of the particles extends in length, and the velocity of the particles gradually increases, while the angular velocity and contact stress gradually decrease. (3) The displacement of the silo is relatively minor and diminishes as the quantity of discharge apertures rises. This paper offers a theoretical reference for the optimization of the structural design, grain discharge process, and overall performance of underground grain squat silos. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Granular Matter is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10035-025-01602-y
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        Text: English
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        Type: general
      – SubjectFull: Particle dynamics analysis
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      – SubjectFull: Grain storage
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      – SubjectFull: Silos
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      – SubjectFull: Structural design
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      – SubjectFull: Computer simulation
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      – TitleFull: Dynamic behavior of eccentric discharging in the underground grain silo based on discrete element method.
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              Text: Apr2026
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              Y: 2026
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