The paper presents a new tool “the method of IR transparent thick plate” that can be used to study the heat and mass transfer processes in the air-liquid-solid contact line area. Its distinctive feature as compared to the previously known methods is the solution of the initial-boundary problem for the heat conductivity equation, which in terms of mathematics is a correct problem. Currently, the heat and mass transfer processes in the area of the contact line are not completely understood because of its small size and a limited set of applied research methods. The challenges in modeling of contact line phenomena have to do with the fact that several physical effects such as evaporation, viscous flow, surface tension, thermocapillary stresses, London-van der Waals forces, disjoining pressure, nonequilibrium effects are coupled together and all significant in this highly localized region. This leads to difficulties in both mathematical modeling and design of experiments. The experimental part of the study includes the evaporation of a liquid drop on a sapphire substrate. The upper part of the sapphire glass is coated with a high heat-resistant black graphite paint (Graphit 33), which is a non-transparent for visual and IR-rays. Measurements of various physical, chemical and geometrical properties of this coating have been done by electron microscopy and other techniques. Trial experiments on the drop evaporation were carried out. The sapphire surface temperature fields after single drop deposition were obtained using the IR-scanner. The experimental local heat flux distribution at drop evaporation on the sapphire surface with two small local highs close to the contact line regions has been measured.

论文提出了一种新工具“红外透明厚板法”，可用于研究气-液-固接触线区域的传热和传质过程。与之前已知的方法相比，它的显着特点是求解热导方程的初始边界问题，这在数学上是一个正确的问题。目前，由于接触线面积小和应用研究方法有限，接触线区域的传热和传质过程尚未完全了解。接触线现象建模的挑战与以下几个物理效应有关，例如蒸发、粘性流动、表面张力、热毛细管应力、伦敦范德华力、分离压力、非平衡效应耦合在一起，在这个高度局部化的区域中都很重要。这导致数学建模和实验设计的困难。该研究的实验部分包括在蓝宝石衬底上蒸发液滴。蓝宝石玻璃的上部涂有高耐热黑色石墨涂料（Graphit 33），对可见光和红外线不透明。这种涂层的各种物理、化学和几何特性的测量已经通过电子显微镜和其他技术完成。进行了液滴蒸发试验。使用红外扫描仪获得单滴沉积后的蓝宝石表面温度场。