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Jukka Aho
beac1c264f
New 307-line test file for complete Stokes flow implementation:
- Tests mixed finite elements with velocity (Vec{2} at vertices)
and pressure (Float64 at cell centers) DOFs
- Implements real viscous term assembly: ∫μ∇u:∇v dx
- Implements real divergence operator: ∫p(∇·v) dx
- Solves incompressible Stokes flow: -μΔu + ∇p = f, ∇·u = 0
- Validates saddle-point system structure [A B'; B 0]
- Tests boundary conditions (no-slip on bottom)
- Verifies incompressibility constraint ∇·u = 0
Demonstrates complete Stokes physics with mixed DOF types and
cell-entity DOFs for incompressible flow applications.