Experimental and SPH studies of reciprocal wet-bed dam-break flow over obstacles

Armin Ansari, Ehsan Khavasi and Jafar Ghazanfarian
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Armin Ansari: Mechanical Engineering Department, University of Zanjan, University Blvd., Zanjan, Iran
Ehsan Khavasi: Mechanical Engineering Department, University of Zanjan, University Blvd., Zanjan, Iran
Jafar Ghazanfarian: Mechanical Engineering Department, University of Zanjan, University Blvd., Zanjan, Iran

International Journal of Modern Physics C (IJMPC), 2021, vol. 32, issue 07, 1-33

Abstract: Different permutations of the single and the two-fold dam-break flow have been investigated using the mesh-free smoothed-particle hydrodynamics and the experimental setup. The free-surface deformation in the case with the wet bed for five different downstream water heights has been investigated and respective numerical and experimental results were presented. The results demonstrate that the increase of the water height over the wet bed leads to the reduction of the flow front velocity. Effect of considering or omitting the dam gate during the numerical simulation has also been examined, which proves that the simulations including the dam gate show improved agreement with the experimental results. Influence of the three-dimensional cubic, triangular, circular and square cylindrical obstacles and their position on flow characteristics has been investigated. As the distance between the triangular obstacle and the gate increases, a bore is created at the position closer to the top of the triangle. In addition, it is found that larger force is exerted on the circular cylinder in comparison to the square cylinder.

Keywords: Two-fold dam break; LAMMPS; SPH method; free-surface flow (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0129183121500984

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