Thanks Daniel.
I will try the first approach. My time dependent Function class returns an
update and not a new value. Actually, I am trying to solve a free surface
flow problem with moving mesh(for very small displacements). I am
implementing the flow and mesh movement in a decoupled way. So at
Bhanu,
[...]
> VectorTools::interpolate_boundary_values(move_dof_handler, 106,
> move_boundary_values_function, move_boundary_values);
> MatrixTools::apply_boundary_values(move_boundary_values,
> move_system_matrix, move_solution, move_system_rhs);
>
> instead of 'constraints'.
> No
