This paper proposes and validates a numerical iterative model to evaluate the thermal resistance of multilayer systems (walls) when in a dynamic state. First, the validation is performed numerically, then the second step of validation uses the temperature and heat flux values recorded during experimental tests performed in a hot box chamber. These validations involve comparing the results obtained with those expected, given the thermal properties of each material and thickness of each wall layer. The paper first presents the analytical solution for simulating heat transfer by conduction in the frequency domain, through the multilayer system. This is generated by imposing temperatures on the external surfaces, when the thermal properties of the materials are known. The model is then modified by assuming the wall is composed of a single layer with unknown thermal properties. The temperatures and heat fluxes, provided earlier by the analytical model and imposed on the external surfaces, lead to a nonlinear system that can be solved for the unknown thermal properties. It is solved by implementing an iterative approach based on the Newton-Raphson method. After the validation of the proposed model, this is used to evaluate the thermal resistance of a multilayered wall subjected to real conditions.
