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Title: Gas-phase diffusion in porous media: Comparison of models

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.
Authors:
Publication Date:
OSTI Identifier:672092
Report Number(s):SAND--98-1417C; CONF-980559--
ON: DE98003553; TRN: AHC2DT07%%251
DOE Contract Number:AC04-94AL85000
Resource Type:Conference
Data Type:
Resource Relation:Conference: TOUGH `98 workshop, Berkeley, CA (United States), 4-6 May 1998; Other Information: PBD: 1998
Research Org:Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:USDOE Office of Financial Management and Controller, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; ADVECTION; DIFFUSION; POROUS MATERIALS; MATHEMATICAL MODELS; COMPARATIVE EVALUATIONS; GAS FLOW