Update demonstration_cases.rst

docs/tutorials/demonstration_cases.rst

@@ -1,2 +1,29 @@
 Demonstration cases
 ===================
+In the `example folder  ... you find a collection of input files needed to run example models.
+
+
+1. Install aeolis
+
+pip install aeolis
+
+2. Install the examples
+
+To install the examples do the following:
+
+.. code-block:: bash
+
+   aeolis examples .
+
+This will install the examples in the current directory. If you want to install them in a different directory, replace the "." with the path to the directory you want to install the examples in.
+
+3. Run the simulation
+
+Run the simulation with:
+
+.. code-block:: bash
+
+    aeolis run aeolis_examples/parabolic_dune_model/aeolis.txt
+
+
+4. View/plot the results