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Delayed mesh relaxation for multi-material ALE formulation |
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| Institution: | 1. Ph.D. Civil Engineering, University of Science and Technology of Lille, France;2. Livermore Software Technology Corp., 7374 Las Positas Rd., Livermore, CA 94550, USA;1. Jo?ef Stefan Institute, Reactor Engineering Division, Ljubljana, Slovenia;2. Paul Scherrer Institute, Nuclear Energy and Safety, Villigen, Switzerland;1. Niccolò Cusano University, Rome, Italy;2. Unesco Chair “Water Resources Management and Culture”, University for Foreigners of Perugia, Italy;3. University of Naples “Parthenope”, Naples, Italy;4. DEIM - Engineering School, University Of Tuscia, Viterbo, Italy;1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, PR China;2. The First Research Institute of Ministry Public Security, Beijing 100048, PR China |
| Abstract: | Multi-Material Arbitrary Lagrangian–Eulerian (ALE) finite element methods can solve large deformations in fast dynamic problems like explosions because the mesh motion can be independent of the material motion. However materials must flow between elements and this advection involves numerical dissipations. The rezoning mesh method presented in this paper was designed to reduce these numerical errors for shock wave propagation. The mesh moves to refine the elements near the shock front. This refinement limits the advection fluxes and so the numerical diffusion. This technique is applied to the numerical simulations of airblast problems for which a parameter controlling the mesh refinement is studied. |
| Keywords: | Delayed mesh relaxation Relaxation delay parameter Multi-material ALE formulation Shock wave Airblast |
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