Neumann conditions

Hello,

I wanted to know if a "Neumann" condition exists in NGSolve, such as the "Dirichlet = "fix"" implemented. 

Thanks !

Neumann bc = 0 is default if no dirichlet is at this boundary. For nonhomogeneous add a source term to this boundary, see for example traction boundary conditions here:

docu.ngsolve.org/latest/i-tutorials/wta/...3D.html?highlight=ds