Add one picture.

git-svn-id: https://svn.dealii.org/trunk@25615 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-20/doc/results.dox b/deal.II/examples/step-20/doc/results.dox
index f281abd6940c0a0ac153ce91a96b823ef6d8d614..479584439cc9c43bb7543d6138e55d42a93df97d 100644 (file)
--- a/deal.II/examples/step-20/doc/results.dox
+++ b/deal.II/examples/step-20/doc/results.dox
@@ -283,6 +283,12 @@ KInverse<dim>::value_list (const std::vector<Point<dim> > &points,
 }
 @endcode
 
+A piecewise constant interpolation of the diagonal elements of the
+inverse of this tensor (i.e., of <code>normalized_permeability</code>)
+looks as follows:
+
+@image html step-20.k-random.png
+
 
 With a permeability field like this, we would get x-velocities and pressures as
 follows:

diff --git a/deal.II/examples/step-20/doc/step-20.k-random.png b/deal.II/examples/step-20/doc/step-20.k-random.png
new file mode 100644 (file)
index 0000000..b9858cc
Binary files /dev/null and b/deal.II/examples/step-20/doc/step-20.k-random.png differ