Darcy-Forchheimer equation 1 Darcy-Forchheimer equations 1 Field formulation 1 Finite element 1 Finite element method 1 Fixed points 1 Flow of fluids 1 Forchheimer 1 Forchheimer models Galerkin methods 1 Heat equation 1 Heat transfer 1 Nonlinear equations 1 Nonlinear viscosity 1 Partial differential equations 1 Property 1 Variational problems 1