Unsteady Heat Transfer in Bilayer, and Three-Layer Materials

The main objective of this work is to give an application of the heat transfer equation to study in the first moments, the heat flow by conduction through composite materials along the real axis (Ox). We will first give an analytical study based on separate variables method (SVM). Next, we will discuss the behavior of heat transfer as a function of the thermo-physical properties of the two materials such as conductivities, dif-fusivities, thicknesses and Biot numbers. Finally, we will pass to the case of three-layer, in which the correspondence with the first case is given. The graphs are obtained from Maple program.