Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme
Inclined overflow gates are widely used in open channels to meet different flow rate requirements by promptly adjusting their openings according to varied water levels. The characteristics of such gates are quite complex and need intensive study. To develop an effective and efficient numerical metho...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-01-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/19942060.2017.1406872 |
| _version_ | 1819070288929751040 |
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| author | Wei Diao Yongguang Cheng Manjun Xu Jiayang Wu Chunze Zhang Wei Zhou |
| author_facet | Wei Diao Yongguang Cheng Manjun Xu Jiayang Wu Chunze Zhang Wei Zhou |
| author_sort | Wei Diao |
| collection | DOAJ |
| description | Inclined overflow gates are widely used in open channels to meet different flow rate requirements by promptly adjusting their openings according to varied water levels. The characteristics of such gates are quite complex and need intensive study. To develop an effective and efficient numerical method for studying the hydrodynamic features of similar engineering structures with fluid structure interactions and free-surface flows, we propose a free-surface lattice Boltzmann-immersed boundary (FSLB-IB) coupling model, in which the free-surface flow is modeled by the lattice Boltzmann (LB) method and the moving boundaries are handled by the immersed boundary (IB) method. To solve the incompatibility issue arising from the coupling of the FSLB model and IB method, two treatments, namely the velocity correction in the empty cells for matching the IB speed with the local fluid velocity, and the iterative force-correction for enhancing accuracy, are introduced. The feasibility and accuracy of the proposed coupling scheme are first validated by two benchmark cases. Then the FSLB-IB scheme is applied to analyze the hydraulic characteristics of an inclined overflow gate in different working conditions. The good agreements between the simulated and empirical hydraulic parameters as well as the reasonable flow features show that the proposed coupling scheme is feasible for simulating practical hydraulic problems. |
| first_indexed | 2024-12-21T17:03:34Z |
| format | Article |
| id | doaj.art-debd30de74b34dc09b785363d22b7887 |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-12-21T17:03:34Z |
| publishDate | 2018-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-debd30de74b34dc09b785363d22b78872022-12-21T18:56:36ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2018-01-0112125026010.1080/19942060.2017.14068721406872Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling schemeWei Diao0Yongguang Cheng1Manjun Xu2Jiayang Wu3Chunze Zhang4Wei Zhou5Wuhan UniversityWuhan UniversityWuhan UniversityWuhan UniversityWuhan UniversityWuhan UniversityInclined overflow gates are widely used in open channels to meet different flow rate requirements by promptly adjusting their openings according to varied water levels. The characteristics of such gates are quite complex and need intensive study. To develop an effective and efficient numerical method for studying the hydrodynamic features of similar engineering structures with fluid structure interactions and free-surface flows, we propose a free-surface lattice Boltzmann-immersed boundary (FSLB-IB) coupling model, in which the free-surface flow is modeled by the lattice Boltzmann (LB) method and the moving boundaries are handled by the immersed boundary (IB) method. To solve the incompatibility issue arising from the coupling of the FSLB model and IB method, two treatments, namely the velocity correction in the empty cells for matching the IB speed with the local fluid velocity, and the iterative force-correction for enhancing accuracy, are introduced. The feasibility and accuracy of the proposed coupling scheme are first validated by two benchmark cases. Then the FSLB-IB scheme is applied to analyze the hydraulic characteristics of an inclined overflow gate in different working conditions. The good agreements between the simulated and empirical hydraulic parameters as well as the reasonable flow features show that the proposed coupling scheme is feasible for simulating practical hydraulic problems.http://dx.doi.org/10.1080/19942060.2017.1406872Inclined overflow gatefree-surface flowimmersed boundary methodlattice Boltzmann methodhydraulic characteristics |
| spellingShingle | Wei Diao Yongguang Cheng Manjun Xu Jiayang Wu Chunze Zhang Wei Zhou Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme Engineering Applications of Computational Fluid Mechanics Inclined overflow gate free-surface flow immersed boundary method lattice Boltzmann method hydraulic characteristics |
| title | Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme |
| title_full | Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme |
| title_fullStr | Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme |
| title_full_unstemmed | Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme |
| title_short | Simulation of hydraulic characteristics of an inclined overflow gate by the free-surface lattice Boltzmann-immersed boundary coupling scheme |
| title_sort | simulation of hydraulic characteristics of an inclined overflow gate by the free surface lattice boltzmann immersed boundary coupling scheme |
| topic | Inclined overflow gate free-surface flow immersed boundary method lattice Boltzmann method hydraulic characteristics |
| url | http://dx.doi.org/10.1080/19942060.2017.1406872 |
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