Numerical modeling of the asymmetric hot plate method considering lateral convective losses

Abstract

In this study, a numerical model of the asymmetric hot plate method was developed to determine the thermal properties of materials. The proposed model considers the convective heat loss around the device. First, a numerical calculation code is developed to determine the temperature evolution at the measurement points. This calculation code is then used to perform a reduced sensitivity study on various parameters. The Levenberg-Marquardt algorithm was used to identify the thermal properties of different materials from the thermogram. The impacts of the convection coefficient h and insulation thickness on the calculation of the estimates were studied. Finally, an experimental study was conducted using several materials. The thermal properties were compared with experimental results obtained using other measurement methods. A satisfactory agreement was obtained.