A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes

We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. solve the Navier–Stokes equations with component transport in free-flow region, to dynamic two-phase, two-component pore-network (PNM) porous domain. The multi-physics allows temporally resolve processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- temperature-depended fluid properties. Carefully chosen coupling conditions monolithic solver ensure local conservation of mass, momentum, energy fluxes, particular at interface between both domains. for wetting non-wetting pressure fields consider advective gas network. Numerical examples demonstrate that is able cover wide range physical relevant show mutual interaction two subregions. implemented modular open-source framework DuMux such extensions straight-forward.