关键词: 传热过程, 热阻网络, 数值计算, CFD, MATLAB

Abstract: In order to cultivate students' thinking of heat transfer in the teaching process of undergraduate, this paper mainly introduces the analytical solution of heat conduction, the experimental method of convective heat transfer and the numerical solution of heat transfer process. Use the thermal resistance network graph to analyze the heat transfer process of the one-dimensional steady heat conduction flat wall, multi-layer composite wall and composite wall, so that the students can gain a thorough understanding of it. The introduction of the criterion number greatly reduces the number of experiments under the guidance of the similarity principle, and the application of the experimental correlation is promoted. MATLAB will be used to do numerical simulations after class, and the results of thermal calculation are displayed intuitively in the classroom. With the help of the sunflower phase change heat storage model, CFD numerical calculation is introduced into the teaching of heat transfer, so that students can understand the heat transfer process vividly, and experimental methods are combined with theoretical knowledge organically, so as to cultivate students' ability to analyze and solve practical heat transfer problems.

Key words: Heat transfer process, Thermal resistance network, Numerical calculation, CFD, MATLAB