Nomads in the desert make ice by exposing a thin water layer to cold air during the night. This icing or freezing of thin layers of water is often also referred to as ice making by nocturnal (or night time) cooling, where the surface temperature of water is lowered considerably by radiative and convective cooling, and it had been practiced extensively in ancient India [15, 16]. To model this process and evaluate the conduction process in the water layer, consider a 5-mm thick horizontal layer gets cooled such that its top surface is at a temperature of – 5°C. After a while, the water begins to freeze at the top surface and the ice front expands downward through the water layer. Determine the location of the solid-liquid (ice-water) interface if the bottom surface temperature of the liquid water is at 38C. State your assumptions for the model and calculations.