Rainwater pipeline siltation significantly impacts the flow capacity of drainage infrastructure, increasing the risk of flood disasters. Existing studies does not consider the energy dissipation caused by the gap fluid effect and quantification of “particle–liquid–gas” coupling relationship. To address these gaps, particle–liquid–gas coupling governing equations and constraint conditions are constructed to improve the accuracy of fluid–structure coupling calculation in a silted pipeline. Then, combining semi-empirical formulas, energy dissipation theory, and elastic fluid dynamics, a contact force model with wet particle method, dry particle method, and damping coefficient is constructed to improve the simulation accuracy of particle and liquid motion. By analyzing Di Felice resistance, pressure gradient force, and virtual mass force, a high-resolution computational fluid dynamics and discrete element method coupling model of silted pipeline is constructed to formulate the response characteristics of siltation flow in rainwater pipelines. The results indicate that the error rate of the proposed simulation model is maintained within [5.83, 6.79] for siltation flow analysis, which is far better than other numerical simulation methods. The variation interval of correlation coefficients under different siltation scenarios is [0.87, 0.92], which indicates high reliability and robustness. For siltation degree of 0.2, the average flow velocity at the inlet, midpoint, and outlet sections is 27.66%, 8.42%, and 11.31% lower compared to the non-silted section, respectively. The theoretical structural formula of average flow velocity in the silted pipeline can be calculated by modified Manning formula and measured siltation parameters. These findings can provide guidance on higher precision flood numerical simulation and early warning in the future.
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Response characteristics of siltation flow in urban rainwater pipelines using computational methods
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January 2025
Research Article|
January 07 2025
Response characteristics of siltation flow in urban rainwater pipelines using computational methods
Special Collection:
Flow and Civil Structures
Ruoyi Wang (王若仪);
Ruoyi Wang (王若仪)
(Conceptualization, Investigation, Methodology, Writing – original draft)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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Danyang Di (狄丹阳)
;
Danyang Di (狄丹阳)
a)
(Conceptualization, Investigation, Methodology, Project administration, Writing – original draft)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
2
Engineering Research Center for Urban Flood Resilience in Henan Province
, Zhengzhou, Henan 450001, People's Republic of China
a)Author to whom correspondence should be addressed: [email protected]
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Hongyuan Fang (方宏远);
Hongyuan Fang (方宏远)
(Conceptualization, Formal analysis, Investigation)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
3
Yellow River Laboratory (Henan)
, Zhengzhou, Henan 450001, People's Republic of China
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Bin Li (李斌)
;
Bin Li (李斌)
(Conceptualization, Methodology)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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Mingsheng Shi (石明生);
Mingsheng Shi (石明生)
(Conceptualization, Methodology)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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Niannian Wang (王念念);
Niannian Wang (王念念)
(Data curation, Formal analysis)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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Tilang Zhang (张体浪);
Tilang Zhang (张体浪)
(Data curation, Formal analysis, Validation)
4
China Construction Seventh Bureau Second Construction Co., LTD
, Suzhou, Jiangsu 215334, People's Republic of China
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Tianwei Li (李天威);
Tianwei Li (李天威)
(Formal analysis, Investigation, Methodology)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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Zhaoyang Zhang (张朝阳)
Zhaoyang Zhang (张朝阳)
(Conceptualization, Investigation, Methodology, Validation)
1
School of Water Conservancy and Transportation, Zhengzhou University
, Zhengzhou, Henan 450001, People's Republic of China
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a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 37, 017113 (2025)
Article history
Received:
November 08 2024
Accepted:
December 15 2024
Citation
Ruoyi Wang, Danyang Di, Hongyuan Fang, Bin Li, Mingsheng Shi, Niannian Wang, Tilang Zhang, Tianwei Li, Zhaoyang Zhang; Response characteristics of siltation flow in urban rainwater pipelines using computational methods. Physics of Fluids 1 January 2025; 37 (1): 017113. https://doi.org/10.1063/5.0247883
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