diffusivity_tensor_zero.m

function diffusivity = diffusivity_tensor_zero(glob,U,params)
% function diffusivity = diffusivity_tensor_zero(glob,U,params)
%
% function computing the diffusivity pointwise evaluation in the point
% sequences indicated by global coordinates in the columns of the matrix glob.
%
% generated fields of diffusivity:
%     epsilon: upper bound on diffusivity value
%     K      : diffusivity tensor, i.e. a sparse square matrix of size
%              '2*dim x 2*dim'

% glob column check
if params.debug
  if ~isempty(glob) && size(glob,1) < size(glob,2)
    warning('coordinates in variable glob are given row-wise, but expected them to be column-wise');
    if params.debug > 2
      keyboard;
    end
  end
end

diffusivity.K       = 0;
diffusivity.epsilon = 0;

%| \docupdate