Gas transport in unsaturated porous media: the adequacy of Fick's law
The increasing use of natural unsaturated zones as repositories for landfills and disposal sites for hazardous wastes (chemical and radioactive) requires a greater understanding of transport processes in the unsaturated zone. For volatile constituents an important potential transport mechanism is gaseous diffusion. Diffusion, however, cannot be treated as an independent isolated transport mechanism. A complete understanding of multicomponent gas transport in porous media (unsaturated zones) requires a knowledge of Knudsen transport, the molecular and nonequimolar components of diffusive flux, and viscous (pressure driven) flux. This review presents a brief discussion of the underlying principles and interrelationships among each of the above flux mechanisms. -from Authors
Citation Information
Publication Year | 1989 |
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Title | Gas transport in unsaturated porous media: the adequacy of Fick's law |
Authors | D.C. Thorstenson, D.W. Pollock |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Reviews of Geophysics |
Index ID | 70015358 |
Record Source | USGS Publications Warehouse |