Delgato, Yngrid Zacharias [UNESP]Wasques, Vinícius Francisco [UNESP]2023-07-292023-07-292022-12-01Computational and Applied Mathematics, v. 41, n. 8, 2022.1807-03022238-3603http://hdl.handle.net/11449/246070This paper presents a study of the heat transfer in objects, considering uncertain parameters such as the thermal diffusion coefficient and the initial condition. The uncertainty is modeled by intervals and fuzzy values. The fuzzy solutions to the problem are obtained from the Zadeh’s extension principle. This work presents the characterization of the interval and fuzzy solutions by means of α-cuts, as well as associations between the propagation of uncertainty and the physical properties of materials. A comparison between the classical solution and the solutions obtained by defuzzification methods is also presented. To illustrate the results, some examples are provided, considering different materials.engFuzzy differential equationsHeat equationZadeh extension principleArtigo10.1007/s40314-022-02055-22-s2.0-85139830476