Numerical modeling of local scour due to submerged wall jets using a strict vertex-based,terrain conformal,moving-mesh technique in OpenFOAM |
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| Affiliation: | 1. Environmental Microbial Genomics, École Centrale de Lyon, Université de Lyon, Ecully, 69134 CEDEX, France;2. Environmental Biotechnology Laboratory, School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India;3. Wetland Research and Training Center, Chilika Development Authority, Department of Forest and Environment, Government of Odisha, Bhubaneswar, 751014, India;4. ISARA, Department of Agroecology and Environment, Lyon, 23 rue Jean Baldassini 69364 LYON CEDEX 07, France;1. Polish Academy of Sciences, Institute of Geography and Spatial Organization, Research Station in Szymbark, 38-311 Szymbark 430, Poland;2. Polish Academy of Sciences, Institute of Geography and Spatial Organization, Department Polish Academy of Sciences, Institute of Geography and Spatial Organization, Department of Geoenvironmental Research, Św. Jana 22, 31-018 Kraków, Poland;3. The Jan Kochanowski University, Institute of Geography and Environmental Sciences, Uniwersytecka 7, 25-406 Kielce, Poland;4. Bar-Ilan University, Department of Geography and Environment, Ramat-Gan, 5290002 Israel;1. Ocean College, Zhejiang University, Hangzhou, 310058, China;2. Civil and Environmental Engineering, Lehigh University, Bethlehem, PA, USA;1. School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China;2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;1. Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran;2. Civil and Environmental Engineering and Water Engineering Research Institute, Tarbiat Modares University, Tehran, Iran;1. Laboratory for Hydraulics Saint-Venant (LHSV, ENPC-EDF R&D-Cerema), Université Paris-Est, 6 Quai Watier, BP 49, 78401, Chatou Cedex, France;2. CONACYT, Centro de Investigación en Matemáticas A.C., (CIMAT), Unidad Mérida, Sierra Papacal, CP, Mérida, Yucatan, 97302, Mexico;3. Laboratory for Hydraulics and Environment (LHE), Institut National de La Recherche Scientifique, Université Du Québec, 490 Rue de La Couronne, G1K 9A9, Québec (QC), Canada |
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| Abstract: | This study presents the implementation and validation of a new sediment-scour model with a strict vertex-based,terrain conformal,moving-mesh technique within the framework of OpenFOAM.OpenFOAM lacks the ability to simulate large-amplitude motion needed for analysis of sediment-scour problems,and,thus,its application normally is restricted to small-amplitude cases to prevent computational divergence due to mesh deterioration.The proposed simple,moving-mesh technique in OpenFOAM is implemented to overcome the shortcomings of the conventional automatic mesh-motion techniques in handling large-amplitude moving geometries.The model is used to simulate a simple case of prescribed boundary motion,a previous experiment in the literature,and a new laboratory experiment for local scour due to submerged wall jets.The results are compared with both the experimental and other numerical results.The comparisons demonstrate that the proposed model has the novel advantage of allowing for more severe topographic variations,and can provide more reliable predictions for the key characteristics and evolution of the bed profiles in wall jet scour problems.Furthermore,to improve the practice of modeling wall jet scour,various turbulence modeling approaches and bedload equations also are evaluated and compared. |
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| Keywords: | Numerical modeling Sediment scour Submerged wall jets Moving mesh OpenFOAM Bed evolution |
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