Abstract: A good experiment to show how gas is heated and expand in the hot fountain experiment，in which a

fountain is produced by turning a mole tube containing some hot water upside down. Some experiment data can be

gotten by analyzing the video which is produced when we are doing the experiment with a set of partly mechanized

devices. Also，based on Fourier heat transfer and equal pressure expansion，we build up a model to explain the relation

between the height of the fountain and the temperature. And we compare the theoretical results and experiment

results.

Key words: hot fountain, height, temperature, Fourier heat transfer