期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 289, 期 -, 页码 209-226出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2015.02.004
关键词
Particle methods; Meshless methods; Smoothed particle hydrodynamics; Energy balance; Numerical dissipation; Validation
资金
- Flagship Project RITMARE - The Italian Research for the Sea
- Italian Ministry of Education, University and Research within the National Research Program
- Region Pays de la Loire [2012-12072]
An in-depth analysis of the energy balance in the delta-SPH model has been carried on. In comparison to the standard SPH scheme, the mechanical energy equation of the d-SPH variant is characterized by a further term that is generally dissipative and is related to the diffusive operator inside the continuity equation. The behaviour and the structure of such a term have been studied in detail and a number of specifically conceived test cases have been considered, highlighting that the dissipative term is generally small and it mainly acts when spurious high-frequency acoustic components are excited. In spite of such a dissipation mechanism, the d-SPH appears more accurate than the standard SPH scheme even in simulating inviscid fluids. (C) 2015 Elsevier B.V. All rights reserved.
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