Improved δ-SPH Scheme With Automatic and Adaptive Numerical Dissipation
| Autor: | Xesús Nogueira, Luis Ramírez, Fermín Navarrina, Sofiane Khelladi, Abdelkader Krimi, Michael Deligant |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Scheme (programming language)
Work (thermodynamics) lcsh:Hydraulic engineering Geography Planning and Development adaptive dissipation Aquatic Science Kinetic energy Weakly compressible flows 01 natural sciences Biochemistry 010305 fluids & plasmas lcsh:Water supply for domestic and industrial purposes Robustness (computer science) lcsh:TC1-978 0103 physical sciences Applied mathematics 0101 mathematics Smoothing particle hydrodynamics Water Science and Technology computer.programming_language Physics lcsh:TD201-500 Dissipation Adaptive dissipation 010101 applied mathematics Flow (mathematics) smoothing particle hydrodynamics Compressibility Particle Computer Science::Programming Languages weakly compressible flows computer |
| Zdroj: | Water, Vol 12, Iss 2858, p 2858 (2020) RUC. Repositorio da Universidade da Coruña instname RUC: Repositorio da Universidade da Coruña Universidade da Coruña (UDC) Water Volume 12 Issue 10 |
| Popis: | In this work we present a &delta Smoothed Particle Hydrodynamics (SPH) scheme for weakly compressible flows with automatic adaptive numerical dissipation. The resulting scheme is a meshless self-adaptive method, in which the introduced artificial dissipation is designed to increase the dissipation in zones where the flow is under-resolved by the numerical scheme, and to decrease it where dissipation is not required. The accuracy and robustness of the proposed methodology is tested by solving several numerical examples. Using the proposed scheme, we are able to recover the theoretical decay of kinetic energy, even where the flow is under-resolved in very coarse particle discretizations. Moreover, compared with the original &delta SPH scheme, the proposed method reduces the number of problem-dependent parameters. |
| Databáze: | OpenAIRE |
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