Users` manual for LEHGC: A Lagrangian-Eulerian finite-element model of HydroGeoChemical transport through saturated-unsaturated media -- Version 1.0

Technical Report · Wed Mar 01 00:00:00 EST 1995

OSTI ID:61152

Yeh, G T ^[1]

---

1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Civil Engineering

The computer program LEHGC is a Hybrid Lagrangian-Eulerian Finite-Element Model of HydroGeoChemical (LEHGC) Transport Through Saturated-Unsaturated Media. LEHGC iteratively solves two-dimensional transport and geochemical equilibrium equations and is a descendant of HYDROGEOCHEM, a strictly Eulerian finite-element reactive transport code. The hybrid Lagrangian-Eulerian scheme improves on the Eulerian scheme by allowing larger time steps to be used in the advection-dominant transport calculations, causing less numerical dispersion and alleviating the problem of negative concentration, and it also is more computationally efficient. LEHGC is designed for generic application to reactive transport problems associated with such systems as contaminant transport in subsurface media. Input to the program includes the geometry of the system, the spatial distribution of finite elements and nodes, the properties of the media, the potential chemical reactions, and the initial and boundary conditions. Output includes the spatial distribution of chemical element concentrations as a function of time and space and the chemical speciation at user-specified nodes.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 61152
• Report Number(s): SAND-93-7081; ON: DE95010513; TRN: AHC29516%%88
• Resource Relation: Other Information: PBD: Mar 1995
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
05 NUCLEAR FUELS
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
ENVIRONMENTAL TRANSPORT
COMPUTER CODES
COMPUTERIZED SIMULATION
RADIOACTIVE WASTES
HAZARDOUS MATERIALS
MANUALS
COMPUTER PROGRAM DOCUMENTATION
FINITE ELEMENT METHOD
RADIOACTIVE WASTE FACILITIES
ROCK-FLUID INTERACTIONS
Yucca Mountain Project