The values set at the Dirichlet boundary conditions, g, and Neumann boundary conditions, h, are set by the "boundary_values" and "boundary_fluxes" respectively.
dirichlet_boundaries
C++ Type:std::vector<BoundaryName>
Unit:(no unit assumed)
Controllable:No
Description:Boundaries on which to apply a fixed value
neumann_boundaries
C++ Type:std::vector<BoundaryName>
Unit:(no unit assumed)
Controllable:No
Description:Boundaries on which to apply a diffusive flux
boundary_values
C++ Type:std::vector<MooseFunctorName>
Unit:(no unit assumed)
Controllable:No
Description:Functors to compute the diffusive flux on each Dirichlet boundary'
boundary_fluxes
C++ Type:std::vector<MooseFunctorName>
Unit:(no unit assumed)
Controllable:No
Description:Functors to compute the diffusive flux on each Neumann boundary'