Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Lagrangian continuum dynamics in ALEGRA.

Technical Report ·
DOI:https://doi.org/10.2172/934850· OSTI ID:934850
;

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.

Research Organization:
Sandia National Laboratories
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
OSTI ID:
934850
Report Number(s):
SAND2007-8104
Country of Publication:
United States
Language:
English

Similar Records

ALEGRA: User Input and Physics Descriptions Version 4.2
Technical Report · Tue Oct 01 00:00:00 EDT 2002 · OSTI ID:805830
ALEGRA-MHD : Version 4.0.
Technical Report · Fri Oct 31 23:00:00 EST 2003 · OSTI ID:918373
ALEGRA-MHD : version 4.6
Technical Report · Fri Dec 31 23:00:00 EST 2004 · OSTI ID:920811

Related Subjects

97 MATHEMATICS AND COMPUTING
99 GENERAL AND MISCELLANEOUS
A CODES
FINITE ELEMENT METHOD
HYDRODYNAMICS
Hydrodynamics-Computer simulation.
Hydrodynamics-Mathematical models.
LAGRANGIAN FUNCTION
Lagrangian functions.
Spatial analysis.
Spatial behavior-Mathematical models.