Educational Heat Transfer Flame

The set of models designed are two flames with an open core with a hole at their top. They are to be printed with filament that changes color with temperature and assembled with a watertight plexiglass covering. A stopper to plug the hole is also included in the design. By filling the models with hot water, the plastic changes color. If the suggested filament is used to print the models, the plastic wall of the model should turn yellow above 45*C. This should happen where the wall is directly in contact with the hot water in the core, and since the heat transfers across the surface, it will be yellow a couple millimeters beyond the core. Just beyond the yellow ring, the filament will turn to an orangey-brown color in the 45*C - 30*C temperature range. At room temperature, the filament is dark green almost black color. The outer thickness of the model will be this color assuming the temperature of the room is below 30*C.

The fun flame shape is intended to be eye catching while the co