The time dependence of the temperature distribution in cooling/heating bodies is studied with a simple, direct visual measurement of infrared radiation. The adoption of a smartphone thermal camera allows one to verify some essential features of theoretical models which describe the temperature field in a cylindrical symmetric configuration for both lumped (concentrated) and non-lumped (distributed) behaviors. Theoretical results and experimental temperature fields acquired via infrared thermal analysis of cooling solid cylinders compare well. The approach can be adopted to support an introductory route to the study of these classes of processes at very low cost and with a fast and simple laboratory procedure. This scheme is appropriate for undergraduate engineering and physics students.

通过简单，直观的红外辐射测量来研究冷却/加热体中温度分布的时间依赖性。智能手机热像仪的采用使人们可以验证理论模型的一些基本特征，这些理论模型以圆柱对称配置的形式描述了集总（集中）行为和非集总（分布式）行为的温度场。通过冷却固体圆柱体的红外热分析获得的理论结果和实验温度场进行了比较。可以采用这种方法来以一种非常简单的方法，以非常低的成本为研究此类过程的入门方法提供支持。该计划适用于工程学和物理专业的本科生。