@@ -88,7 +88,7 @@ make exercise_basic_2pni # builds new executable

* The following set-up should be realized:

__Boundary conditions:__ Dirichlet conditions for the temperature with a temperature gradient of 0.03 K/m and a starting temperature of 283 K.

__Boundary conditions:__ Dirichlet conditions for the temperature with a varying temperature of $`\displaystyle T(y) = 283~\text{K} + 0.03~\frac{\text{K}}{\text{m}} \cdot \left( d_\text{aquifer} - y \right) `$, with the aquifer depth $`\displaystyle d_\text{aquifer}=2700~\text{m}`$.

__Initial conditions:__ The same temperature gradient as in the boundary conditions with an additional lens (with position: 20 < x < 30, 5 < y < 35), which has an initial temperature of 380 K.