Adaptive numerical simulation of the remediation of soil contamination by in-situ gas venting

This paper describes a mathematical model and adaptive numerical simulation of the time-dependent multiphase, multicomponent flow which occurs when a gas venting process is used to remove a volatile contaminant from a porous medium. The numerical simulation is adaptive in both space and time and inv olves the use of a finite element spatial discretization and the SPRINT2D s oftware [6] for time integration. Results are presented which demonstrate t he high quality of the simulation, both in terms of the length scales of th e features that are resolved and the efficiency of the solutions relative t o those obtained on fixed grids.