Energy balance in the δ-SPH scheme

被引：101

作者：

Antuono, M. ^{[1
]}

Marrone, S. ^{[1
,2
]}

Colagrossi, A. ^{[1
]}

Bouscasse, B. ^{[1
]}

机构：

[1] CNR, INSEAN, Marine Technol Res Inst, Rome, Italy

[2] Ecole Cent Nantes, UMR CNRS, LHEEA Lab, Nantes, France

来源：

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 2015年 / 289卷

关键词：

Particle methods; Meshless methods; Smoothed particle hydrodynamics; Energy balance; Numerical dissipation; Validation; SMOOTHED PARTICLE HYDRODYNAMICS; FREE-SURFACE FLOWS; NUMERICAL-SIMULATION; MOLECULAR-DYNAMICS; APPLIED MECHANICS; DIFFUSIVE TERMS; WAVES;

D O I：

10.1016/j.cma.2015.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：209 / 226

页数：18

共 33 条

[1] The damping of viscous gravity waves [J].