 of freedom:
% 
% * 1 capillary phase pressure (Pc)
% * 1 gas phase pressure (Pg)
%% Methods
% * *initializeElements*: Initializes the elements of the model with their 
%                         properties.
% * *setCapillaryPressureDirichletBCAtNode*: Sets pressure Dirichlet 
%                                            boundary conditions for 
%                                            gas-phase pore pressure at a 
%                                            specific node.
% * *setCapillaryPressureDiric