Q1 Confirm/predict the velocity of the propagation front (heat transport) and its relation with Peclet number at different time steps.
Q2 How is Peclet number influencing the average temperature computed as output? What about the thickness of the plastic layer?
Q3 It is a useful exercise to try to estimate the behavior of the system in the "steady state" and its solution at regime. Is there a difference between the plastic and fluid (air) zones? Have the different conductivity coefficients in the two zones any effect?