Author(s)

D.W. Pepper, D.B. Carrington & Z. Shi

Abstract

An h-adaptive finite element model is used to calculate environmental transport problems associated with atmospheric dispersion or groundwater transport in saturated or unsaturated porous media. A coarse mesh is first created; the mesh refines and unrefines locally as the concentration front advances in time. Petrov- Galerkin weighting is used for the advection terms, along with mass lumping. The model is written in C/C++ and runs under WINDOWS on PCs; a WINDOWS based mesh generator also accompanies the model, allowing the user to quickly create an initial mesh with appropriate boundary conditions. Current research includes simulating windfields and species transport over the Nevada Test Site, as well as groundwater flows at the Savannah River Site and the proposed Yucca Mountain Repository Site. 1. Introduction The employment of adapting, unstructured meshes permits one to accurately so

Keywords