2. Some numerical fluid mechanics algorithms for velocity-pressure coupling In this section we consider the stationary two-dimensional Navier-Stokes equations consisting of the equations for the conservation of momentum : {∂(ρuu)∂x+∂(ρvu)∂y=∂∂x(ν∂u∂x)+∂∂y(ν∂u∂y)−∂p∂x+Su∂(