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Title: A Hybrid Micro-Scale Model for Transport in Connected Macro-Pores in Porous Media

Abstract

This paper presents a multi-scale approach for modeling the transport of species in fractured porous media. The multi-scale approach consists of a hybrid model and a pore-scale model that is used to parameterize the hybrid model. The hybrid model explicitly models the advection and diffusion of species in the fracture and treats the porous matrix as a continuum with effective transport properties. The pore-scale model is used to calculate the effective transport properties of the hybrid model. This approach negates the need to calibrate the hybrid model against experimental data, which is common for continuum-scale models of porous media, and allows an arbitrary microstructure to be considered. The paper presents the multi-scale modeling approach along with the details of the hybrid and pore-scale models. Validation of the model is also presented along with several case studies investigating the applicability of the multi-scale modeling approach to different geometries and transport conditions. The case studies show that the multi-scale modeling approach is accurate for various fracture geometries given that the matrix porosity is sufficiently small. The accuracy of the hybrid model decreases with increasing porosity of the matrix.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1239513
Report Number(s):
PNNL-SA-77744
Journal ID: ISSN 0169-7722; KP1702030
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Contaminant Hydrology; Journal Volume: 126; Journal Issue: 1-2
Country of Publication:
United States
Language:
English
Subject:
porous media; fractures; multi-scale modeling; smoothed particle hydrodynamics; uranium

Citation Formats

Ryan, Emily M., and Tartakovsky, Alexandre M. A Hybrid Micro-Scale Model for Transport in Connected Macro-Pores in Porous Media. United States: N. p., 2011. Web. doi:10.1016/j.jconhyd.2011.06.005.
Ryan, Emily M., & Tartakovsky, Alexandre M. A Hybrid Micro-Scale Model for Transport in Connected Macro-Pores in Porous Media. United States. doi:10.1016/j.jconhyd.2011.06.005.
Ryan, Emily M., and Tartakovsky, Alexandre M. Wed . "A Hybrid Micro-Scale Model for Transport in Connected Macro-Pores in Porous Media". United States. doi:10.1016/j.jconhyd.2011.06.005.
@article{osti_1239513,
title = {A Hybrid Micro-Scale Model for Transport in Connected Macro-Pores in Porous Media},
author = {Ryan, Emily M. and Tartakovsky, Alexandre M.},
abstractNote = {This paper presents a multi-scale approach for modeling the transport of species in fractured porous media. The multi-scale approach consists of a hybrid model and a pore-scale model that is used to parameterize the hybrid model. The hybrid model explicitly models the advection and diffusion of species in the fracture and treats the porous matrix as a continuum with effective transport properties. The pore-scale model is used to calculate the effective transport properties of the hybrid model. This approach negates the need to calibrate the hybrid model against experimental data, which is common for continuum-scale models of porous media, and allows an arbitrary microstructure to be considered. The paper presents the multi-scale modeling approach along with the details of the hybrid and pore-scale models. Validation of the model is also presented along with several case studies investigating the applicability of the multi-scale modeling approach to different geometries and transport conditions. The case studies show that the multi-scale modeling approach is accurate for various fracture geometries given that the matrix porosity is sufficiently small. The accuracy of the hybrid model decreases with increasing porosity of the matrix.},
doi = {10.1016/j.jconhyd.2011.06.005},
journal = {Journal of Contaminant Hydrology},
number = 1-2,
volume = 126,
place = {United States},
year = {Wed Jul 13 00:00:00 EDT 2011},
month = {Wed Jul 13 00:00:00 EDT 2011}
}