Simulation of filtration problems in fractured porous media with mixed finite element method (embedded fracture model)

We present a mathematical model of mixed dimension for modeling filtration problems in fractured porous media (built-in model of cracks). The mathematical model is described by a system of parabolic equations: d-dimensional for a porous medium and $(d-1)$-dimensional for a system of cracks. The system of equations is connected by specifying a special flow function. This model allows the use of grids for a matrix of a porous medium not dependent on the grid for cracks. For the numerical solution, an approximation using the mixed finite element method is constructed. The results of the numerical solution of the model problem that show the operability of the proposed method for modeling the flow in fractured porous media are presented.