Reply To: Bounce Back Boundary conditions and lattice nodes locations
Hello Ramiro,
In any case, the lattice nodes and their physical coordinates depend (only) on the geometry and are identical for both lattices (-> the coupling cannot be affected).
The question whether you have on-node or link-wise BC affects where you suppose your virtual, non-discrete domain to end. When you compare with analytical solutions, you should consider this fact, because it affects the order of convergence. Practically, there is not necessarily a problem if one (virtual) domain is slightly larger than the other: the computational domain is the same.