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 [发布机构] Sandia National Laboratories

[关键词] Lagrangian Function Spatial Analysis.;Spatial Behavior-Mathematical Models.;Hydrodynamics-Mathematical Models.;Lagrangian Functions.;99 General And Miscellaneous//Mathematics, Computing, And Information Science