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Finite element modelling of recirculating density-driven saltwater intrusion processes in groundwater
Institution:1. Department of Materials Engineering, Gangneung-Wonju National University, 7 Jugheon-ghil, Gangneung, Gangwon-do 25457, Republic of Korea;2. Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea;1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;2. Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, PR China;1. Department of Applied Physics and Naval Technology, Universidad Politécnica de Cartagena (UPCT), Cartagena, Spain.Paseo Alfonso XIII, 52, 30203 Cartagena, Spain;2. Department of Mining And Civil Engineering, Universidad Politécnica de Cartagena (UPCT), Cartagena, Spain.Paseo Alfonso XIII, 52, 30203 Cartagena, Spain
Abstract:This paper is concerned with an appropriate finite element model for solving transient and steady-state density-driven saltwater intrusion processes in groundwater with or without free surface. Alternative formulations and several numerical solution strategies are discussed. A comparative study is given for a cellular benchmark problem. An implicit predictor-corrector method with automatically adjusted time stepping involving a full Newton method is studied. Results on saltwater wedge displacement and gravity-driven sinking of saltwater from a deposit into the subsurface illustrate the efficacy of the model chosen. The results for the saltwater wedge problems are compared with analytical sharp-interface assessments.
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