A numerical simulation of single and two-phase flow in porous media: A pore sale observation of effective microscopic forces

Abokhedr, M., Vogiatzaki, K., Mitroglou, N. & Gavaises, E. (2015). A numerical simulation of single and two-phase flow in porous media: A pore sale observation of effective microscopic forces. Paper presented at the 6th BETA CAE International Conference, 10-6-2015 - 12-6-2015, MET Hotel, Thessaloniki, Greece.

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Abstract

Modelling fluid flow in rock porous media is a challenging physical problem. Simplified macroscopic flow models, such as the well-known Darcy's law, fail to predict accurately the pressure drop because many flow parameters are not considered while simplifications are made for the multi-scale structure of the rocks. In order to improve the physical understanding for such flows and the accuracy of existent models, there is a need for realistic geometries to be investigated. The present work describes initially single-phase flow simulations performed on numerical grids obtained from reconstruction of 2D images of rock porous media found in the open literature using ANSA®. The results in terms of preferential paths and tortuosity are compared with experiments. Following, multiphase flow models have been utilised focusing on the capturing of the liquid-gas interface motion. It is concluded that for such complex porous rock problems, the multi-scale flow development is grid dependent.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Pore-scale modelling, openFOAM, Hydraulic conductivity, Navier-Stokes equations, Volume of Fluid
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/12004

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