Reply To: Bounce Back Boundary conditions and lattice nodes locations
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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.