Numerical simulation allows computing fundamental properties regarding
the dynamics of immiscible fluid flows in morphologically complex
porous media such as reservoir rocks resolved at the micrometric
pore scale with high resolution X-ray computed tomography. Phenomena
where one invading fluid is injected into the pore space to displace
the defending one are used to estimate, via up-scaling, the variables of
interest, such as relative permeabilities and capillary pressures.
The dynamics of the displacement is determined by the pore space
morphology, the rock wettability to the different fluids, the fluid rheology,
the flow regime and the resulting evolution of the interface between
the two competing fluids.
Usually CFD simulations are based on a constant static contact
angle model. This limitation is relaxed in the present contribution,
where a dynamic contact angle model is used to simulate a simple twophase
flow for which the analytical solution is known and a laminar
oil/water flow through a digital rock sample.
