MODELING TEMPERATURE CHANGES ON THE SURFACES OF THERMAL INSULATION COATINGS

Abstract

Based on the heat transfer ratios, the most acceptable functions for determining the thermal insulation properties of materials and structures were established. Using the Comsol package, models of changes in the temperature of the outer surface of the protective material depending on the heat transfer time were developed. It was established that at the initial stage of heat transfer, the temperature of the outer surface changes non-monotonically. Therefore, when designing a protective structure, attention should be paid to the layers of material that are in direct contact with the protective layer. It is shown that the use of fiberglass as a thermal insulation material provides almost the same level of human protection at minimum (120 W) and maximum permissible (400 W) physical loads. A three-dimensional model was obtained that visualizes the dependence of temperature on the time of heat transfer in depth. This allows us to rationalize not only the thickness of the protective material, but also to select the most acceptable materials in terms of their thermophysical properties. Rapid receipt of graphic material allows us to determine the most acceptable materials and structures by the method of brute force, depending on the environmental conditions and the purpose of the protective device.