Extension of the 'Pore Tree' Model to Describe Convection.
Abstract
The 'pore tree' model of pore structure was developed for catalysts and sorbents to allow diffusion within a porous media in the absence of convection through the media. The pore tree model is extended herein to describe the permeable pore structure which characterizes the subsurface flow of water in soil, the dispersion of contaminants and the in-situ remediation of contaminated sites. Permeability requires a statistical determination of the 'branches' that are common to several trees to allow percolation through the large scale (mobile) structure in addition to diffusion through the smaller scale (immobile) structure. While permeability is dominated by the largest pores, it is important to determine the level of convection that is occurring at the intermediate scales in order to accurately describe transport. (AN)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 18, 1994
- Accession Number
- ADA290725
Entities
People
- Girard A. Simons