2D walls as edges

[RAALVM]

There is a possibility to have edges as walls in 2D simulation, like the surfaces without thickness in 3D simulation? What boundary conditions do I have to put to make it possible? Slip/Simetry, will not feel the wall resistance

[OmkarJ]

Well, all edges that are not prescribed with any boundary conditions are no-slip walls in 2D by default.

[marco.mueller]

there's no such possibility. But you can create thin surfaces which is not that expensive as thin solids in 3D