I am working on the following generalized Stokes problem
σ u−∇ · ( 2 ν ∇u) + grad p = f
u denotes the flow velocity of a fluid moving through the domain Ω, p denotes the pressure acting on the fluid divided by the fluid density, ν denotes the kinematic viscosity of the fluid, σ denotes the reaction coefficient which gives the ratio of the viscosity to the permeability of the fluid, and f denotes a body force acting on the fluid divided by the density.
I am looking for a Matlab code for solving the generalized Stokes equation by the finite element method .