function [Accd, bccd] =  BC(nx,ny,nunk)
% [Accd, bccd] =  BC(nx,ny,nunk)
% This function creates matrices Accd and bccd to impose homogeneous 
% Dirichlet boudary conditions using Lagrange multipliers method.
%
%   nx,ny:  number of elements on each direction
%   nunk:   number of degrees of freedom for the velocity field
%

% Nodes on the Dirichlet boundary



% Imposed boundary conditions


% Boundary conditions' matrix

Accd = [];
% Boundary conditions' vector
bccd = [];

