移液管热喷泉物理过程的研究

Study of the physical process of the pipette hot fountain

装有热水的移液管倒置且尖端朝上时会喷出热水形成喷泉,这是大学物理热学中直观展示气体受热膨胀的一个很好的实验.我们建立了一个傅立叶传热与等压膨胀相结合的模型分析其物理过程,并利用COMSOL软件搭建模型验证.实验上搭建一个半机械化的实验装置,对热喷泉的动态过程进行拍摄,得出了热喷泉高度与热水温度呈线性关系,实验结果与理论模型相符.

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.