In the finite element method, which option is not a natural and direct formulation of momentum and continuity equations?
(a) Velocity-pressure formulation
(b) Penalty formulation
(c) Mixed formulation
(d) Lagrange multiplier formulation
I got this question by my school teacher while I was bunking the class.
My doubt stems from Penalty topic in portion Flows of Viscous Incompressible Fluids of Finite Element Method