TY - JOUR
T1 - Pore-scale modeling and upscaling of nonaqueous phase liquid mass transfer
AU - Held, R. J.
AU - Celia, Michael Anthony
PY - 2001
Y1 - 2001
N2 - A pore-scale model is developed to simulate mass transfer between two fluid phases in a porous medium. The approach uses a network description of the pore space and builds on explicit tracking of the fluid-fluid interfaces in the pore network. Mass transfer is computed as local mass fluxes across each interface, and transport equations are solved in the pore network by a characteristic method. The concept of stagnant-layer diffusion is used to describe the interface mass transfer, where calculated local concentrations control the rates of mass transfer. The model results predict dissolution fronts developed in column experiments of porous media initially at residual nonaqueous phase saturation. The definition of macroscopic mass transfer coefficients is investigated, and comparisons are made for rigorously upscaled quantities.
AB - A pore-scale model is developed to simulate mass transfer between two fluid phases in a porous medium. The approach uses a network description of the pore space and builds on explicit tracking of the fluid-fluid interfaces in the pore network. Mass transfer is computed as local mass fluxes across each interface, and transport equations are solved in the pore network by a characteristic method. The concept of stagnant-layer diffusion is used to describe the interface mass transfer, where calculated local concentrations control the rates of mass transfer. The model results predict dissolution fronts developed in column experiments of porous media initially at residual nonaqueous phase saturation. The definition of macroscopic mass transfer coefficients is investigated, and comparisons are made for rigorously upscaled quantities.
UR - http://www.scopus.com/inward/record.url?scp=0034993237&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034993237&partnerID=8YFLogxK
U2 - 10.1029/2000WR900274
DO - 10.1029/2000WR900274
M3 - Article
AN - SCOPUS:0034993237
SN - 0043-1397
VL - 37
SP - 539
EP - 549
JO - Water Resources Research
JF - Water Resources Research
IS - 3
ER -