Lagrangian continuum dynamics in ALEGRA.

[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.

[发布日期] 2007-12-01

[学科分类] 社会科学、人文和艺术（综合）

[关键词] 97;A CODES;FINITE ELEMENT METHOD;HYDRODYNAMICS;LAGRANGIAN FUNCTION Spatial analysis.;Lagrangian functions.;Hydrodynamics-Mathematical models.;Spatial behavior-Mathematic