Gas-phase diffusion in porous media: Comparison of models
Two models are commonly used to analyze gas-phase diffusion in porous media in the presence of advection, the Advective-Dispersive Model (ADM) and the Dusty-gas Model (DGM). The ADM, which is used in TOUGH2, is based on a simple linear addition of advection calculated by Darcy`s law and ordinary diffusion using Fick`s law with a porosity-tortuosity-gas saturation multiplier to account for the porous medium. Another approach for gas-phase transport in porous media is the Dusty-Gas Model. This model applies the kinetic theory of gases to the gaseous components and the porous media (or dust) to combine transport due to diffusion and advection that includes porous medium effects. The two approaches are compared in this paper.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Financial Management and Controller, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 672092
- Report Number(s):
- SAND-98-1417C; CONF-980559-; ON: DE98003553; TRN: AHC2DT07%%251
- Resource Relation:
- Conference: TOUGH `98 workshop, Berkeley, CA (United States), 4-6 May 1998; Other Information: PBD: 1998
- Country of Publication:
- United States
- Language:
- English
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