Technical Papers and Presentations

We present a numerical model using the Finite Element Method (FEM) with COMSOL Multiphysics^® simulation software to characterize Beer-Lambert law. The Heat Transfer Module was used in the program developed to calculate absorption and propagation of heat wave phenomena in a material. Numerical results are compared against experimental measurements made on alpha brass plates, characterized by Technique Photothermal Radiometry (PTR). We are using the general form PDE interface with the Dependent Variables and Units settings.

Results from the numerical analysis are in good agreement with the measurements obtained from the Radiometry tests. In this technique the material is subjected to a laser heating, producing a thermal wave that is captured with a detector by means of the amplitude and phase parameters. The analysis of the data obtained from the sample provides information about its thermal properties, such as conductivity and diffusivity, which can be correlated with structural changes in a material. Results from this research lead to the characterization of mechanical properties of metallic materials.