Review of enhanced vapor diffusion in porous media

Vapor diffusion in porous media in the presence of its own liquid has often been treated similar to gas diffusion. The gas diffusion rate in porous media is much lower than in free space due to the presence of the porous medium and any liquid present. However, enhanced vapor diffusion has also been postulated such that the diffusion rate may approach free-space values. Existing data and models for enhanced vapor diffusion, including those in TOUGH2, are reviewed in this paper.

[1]  S. W. Webb,et al.  Pore-scale modeling of enhanced vapor diffusion in porous media , 1997 .

[2]  J. Cary.  Soil Heat Transducers and Water Vapor Flow , 1979 .

[3]  C. K. Ho,et al.  A review of porous media enhanced vapor-phase diffusion mechanisms, models, and data: Does enhanced vapor-phase diffusion exist? , 1996 .

[4]  K. Pruess,et al.  TOUGH2-A General-Purpose Numerical Simulator for Multiphase Fluid and Heat Flow , 1991 .

[5]  T. L. Jones,et al.  Enhancement of thermal water vapor diffusion in soil , 1984 .

[6]  Gaylon S. Campbell,et al.  Soil physics with BASIC , 1985 .

[7]  C. K. Ho,et al.  Pore-scale modeling using TOUGH2 , 1998 .

[8]  W. Jury,et al.  Water Vapor Movement in Soil: Reconciliation of Theory and Experiment , 1979 .

[9]  T. Miyazaki.  THE DIFFUSION AND NONEQUILIBRIUM THERMODYNAMIC EQUATIONS OF WATER VAPOR IN SOILS UNDER TEMPERATURE GRADIENTS , 1979 .

[10]  J. Cary.  WATER FLUX IN MOIST SOIL: THERMAL VERSUS SUCTION GARDIENTS , 1965 .

[11]  G. Gee,et al.  Method to estimate water diffusivity and hydraulic conductivity of moderately dry soil , 1995 .

[12]  R. Horton,et al.  Heat, Water, and Solution Transfer in Unsaturated Porous Media: I -- Theory Development and Transport Coefficient Evaluation , 1997 .

[13]  J. R. Philip,et al.  Moisture movement in porous materials under temperature gradients , 1957 .

[14]  Robert P. Ewing,et al.  Modeling percolation properties of random media using a domain network , 1993 .

[15]  F. Phillips,et al.  A numerical model for the movement of H2O, H218O, and 2HHO in the unsaturated zone , 1995 .

[16]  P. Milly,et al.  A Simulation Analysis of Thermal Effects on Evaporation From Soil , 1984 .

[17]  C. K. Ho,et al.  Diffusion with condensation and evaporation in porous media , 1998 .