how to apply componentwise Dirichlet BC

[RWTHLHK]

I began using Gridap today, and its functionality has shocked me. I am trying to use Gridap for custom FEM simulation of mechanics problems. One common requirement in simulation is to apply Dirichlet BC componentwise( like y = 0, x, and z are free). I just went through all the tutorials, but I still need help finding a way to do that. Can you explain how to do that for mechanics simulation?

[JordiManyer]

Hey @RWTHLHK, welcome to the library.

Have a look at the elasticity tutorial. The dirichlet_masks is what you are looking for:

V0 = TestFESpace(model,reffe;
  conformity=:H1,
  dirichlet_tags=["surface_1","surface_2"],
  dirichlet_masks=[(true,false,false), (true,true,true)]
)

You setup one triplet per tag, and it will only apply the bcs on the true components.

[RWTHLHK]

Ah got it！Thanks!