Local thermodynamic description of isothermal single-phase flow in porous media
Galteland, Olav; Rauter, Michael Tobias; Bratvold, Mina S.; Trinh, Thuat; Bedeaux, Dick; Kjelstrup, Signe
Journal article, Peer reviewed
Published version
Permanent lenke
https://hdl.handle.net/11250/3016623Utgivelsesdato
2022Metadata
Vis full innførselSamlinger
- Institutt for bygg- og miljøteknikk [4721]
- Institutt for kjemi [1401]
- Publikasjoner fra CRIStin - NTNU [38484]
Originalversjon
10.1007/s11242-022-01844-xSammendrag
Darcy's law for porous media transport is given a new local thermodynamic basis in terms of the grand potential of confined fluids. The local effective pressure gradient is determined using non-equilibrium molecular dynamics, and the hydraulic conductivity and permeability are investigated. The transport coefficients are determined for single-phase flow in face-centered cubic lattices of solid spheres. The porosity changed from that in the closest packing of spheres to near unity in a pure fluid, while the fluid mass density varied from that of a dilute gas to a dense liquid. The permeability varied between 5.7 × 10 −20 m² and 5.5 × 10 −17 m², showing a porosity-dependent Klinkenberg effect. Both transport coefficients depended on the average fluid mass density and porosity but in different ways. These results set the stage for a non-equilibrium thermodynamic investigation of coupled transport of multi-phase fluids in complex media.