[Libmesh-users] How to define Neuman Boundary Condition in libMesh

[Nikrouz <nik...@gm...>]

Dear All libMesh users

I am currently working with Example Fem_system example No2 titled 
"Nonlinear Elasticity with FEMSystem 
<http://libmesh.github.io/examples/fem_system_ex2.html>".

The boundary conditions used in the code are defined based on 
displacement(Drichlet Boundary condition).

How can I apply force boundary condition on one of the surfaces instead 
of displacement?

Which of the examples is suitable for learning how to define load(s) on 
different surfaces?

Thanks for your help and following!