Lagrangian Continuum Dynamics in ALEGRA.

Wong, M. K. W. ; Love, E.

Technical Information Center Oak Ridge Tennessee

关键词: Lagrangian function;    A codes;    Finite element method;    Hydrodynamics;    Algorithms;   

RP-ID  :  DE2008934850

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Alegra is an ALE (Arbitrary Lagrangian-Eulerian) multi-material finite element code that emphasizes large deformations and strong shock physics. The Lagrangian continuum dynamics package in Alegra uses a Galerkin finite element spatial discretization and an explicit central-difference stepping method in time. The goal of this report is to describe in detail the characteristics of this algorithm, including the conservation and stability properties. The details provided should help both researchers and analysts understand the underlying theory and numerical implementation of the Alegra continuum hydrodynamics algorithm.