A new two-dimensional model of multiphase flow and contaminant transport in the unsaturated zone is presented. The flow model incorporates movement of both the air and water phases in heterogeneous materials with spatial and time varying boundary conditions. The transport model includes retardation, reactions, and both equilibrium and non-equilibrium mass transfer between the air and water phases. The equations describing these phenomena are solved using a finite element method in two-dimensional cartesian and radial coordinates. This coupled model of the air and water phases can be used to model a wide variety of phenomena. These include soil venting to remove volatile organic waste, waste disposal site design, and gas exchange with the atmosphere for use in climate models. The importance of the air phase is illustrated through the discussion of some of these examples.
|Original language||English (US)|
|Journal||National Conference Publication - Institution of Engineers, Australia|
|State||Published - Dec 1 1994|
|Event||Proceedings of the Water Down Under 1994 Conference. Part 3 (of 3) - Adelaide, Aust|
Duration: Nov 21 1994 → Nov 25 1994
All Science Journal Classification (ASJC) codes