+ """ Description : Test solving the diffusion of the temperature T in a solid (default is Uranium).
+ Equation : Thermal diffusion equation \rho cp dT/dt-\lambda\Delta T=\Phi + \lambda_{sf} (T_{fluid}-T)
+ Heat capacity, density, and conductivity of the solid MUST be defined
+ The solid may be extra refrigerated by a fluid with transfer coefficient using functions setFluidTemperature and setHeatTransfertCoeff
+ The solid may receive some extra heat power due to nuclear fissions using function setHeatSource
+ """
+
+ # Prepare for the mesh and initial data