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LaGriT:Meshing for Geological Applications
EES6 Home Grid Projects LaGriT Gridder GMV Demos

Tetrahedral Grid Yucca Mountain Unsaturated Zone


Geologic applications for grids produced with LaGriT are modeling subsurface porous flow and reactive chemical transport by finite element (FEHMN code developed at LANL) and finite difference methods. LaGriT is also used as the first step in quality analysis and manipulation of geometric data.

Projects in which LaGriT is utilized include:

  • Yucca Mountain Site Characterization Project (YMP)
  • Nevada Test Site Underground Test Area Flow and Transport Modeling
  • Southern California Earthquake Center (SCEC) meshing of California Fault Systems
  • Environmental Restoration at Los Alamos and Savannah River
  • Oil and Gas Reservoir Modeling
  • Semiconductor Design Modeling
  • High Speed Hydrodynamics

There are a wide variety of geological applications where accurate representation of complex engineering systems and geologic structure and stratigraphy is critical to producing accurate numerical models of fluid flow and mass transport. Oil and gas reservoir production, groundwater resource development and waste disposal in a geologic repository are examples of the areas where modeling is used to predict the long term behavior of a system. In all the systems, grid generation is a key link between the geoscientific information systems and numerical models. Grids must capture complex geometry and insure the computationals are optimized to produce accurate and stable solutions. LaGriT is a toolbox library with functions to produce 2D and 3D grids of elements that are tetrahedral, triangular, hexahedral and quadrilaterals. A 3D model of a computational mesh created from the 3D model is shown. 2D grids with arbitrary orientation or 3D grids with complex boundaries can be extracted from the geologic framework model. For more details refer to the Geo Meshing Overview (PDF).

LaGriT is a software tool for generating, editing and optimizing multi-material unstructured finite e lement grids (triangles and tetrahedra). LaGriT maintains the geometric integrity of complex input volumes, surfaces, and geologi c data and produces an optimal grid (Delaunay, Voronoi) elements. The LaGriT grid generation system has many special features tailored to geological applications.

LaGriT is a research tool that is under development. Although the code can be made available, we are not in the business of providing software or support. We are looking for new applications for LaGriT software and are intere sted in developing collaborative relationships that provide mutual benefit to both parties.

LaGriT: Los Alamos Grid Tool Box

LaGriT, Los Alamos Grid Toolbox HOME Page

LaGriT Registration - To obtain LaGriT
Publications and Reports Related to LaGriT


3D Orthogonal Hexahedral Grid Generator

GMV 3-D Grid Visualization

Free Software tool designed to view structured or unstructured grids.

MSTK Mesh Framework

MSTK is not a mesh generator but the infrastructure it provides can be used to develop sophisticated mesh generators and other mesh based applications.

Other Los Alamos National Laboratory (LANL) Web Links

Author: Carl W. Gable Home Page

Old GEOMESH site

Finite Element Heat and Mass (FEHM) Porous Flow Code

Hydrology, Geochemistry & Geology Group (EES-6) Group Home Page

LANL Earth and Environmental Science (EES) Division Home Page

Los Alamos National Laboratory Home Page

Comments and questions can be directed to the GEOMESH author and developer at the following address:

Dr. Carl W. Gable

Staff Scientist
E-mail gable -at- lanl -dot- gov
Mail Carl W. Gable

EES-6 MS T003

Los Alamos National Laboratory

Los Alamos NM 87545
Phone 505-665-3533
Fax 505-665-3687
Homepage http://www.ees.lanl.gov/staff/gable
Group Hydrology, Geochemistry & Geology Group (EES-6)

(Geodynamics/Mesh Generation/Hydrology)

X3D and LaGriT Trademark is owned by the University of California
Copyright UC 1995   Disclaimer   www@lanl.gov   8 - December - 1996