A discussion about the advantages of the non-uniform mesh over the uniform one is also presented. The results obtained by using the FDTD method with the proposed algorithm have been contrasted not only with a typical uniform mesh algorithm, but also with experimental measurements for a two-wire crosstalk set-up, leading to excellent agreement between theoretical and experimental waveforms. The proposed algorithm has been formulated in a general mathematical form, where convenient spacing functions can be defined for the problem space discretization, allowing the inclusion of small sized objects in the FDTD method and the calculation of detailed variations of the electromagnetic field at specified regions of the computation domain. This paper presents an algorithm used to automatically mesh a 3D computational domain in order to solve electromagnetic interaction scenarios by means of the Finite-Difference Time-Domain -FDTD- Method. Validation of a non-uniform meshing algorithm for the 3D-FDTD method by means of a two-wire crosstalk experimental set-up. Affiliation: Associate Professor, Mines Faculty, Electrical Energy and Automation Department, Universidad Nacional de Colombia, Medellín, Colombia.Į-mail: to cite: Jiménez-Mejía, E., & Herrera-Murcia, J. Affiliation: Graduate Student, Facultad de Ciencias, Physics Department, Universidad Nacional de Colombia, Medellín, Colombia.Į-mail: Javier Gustavo Herrera Murcia: Electrical Engineer, Magister in Electrical Engineering and PhD in Engineering, Universidad Nacional de Colombia, Colombia. Herrera-Murcia 2ġ Raúl Esteban Jiménez Mejía: Electrical Engineer, Magister in Electrical Engineering, Universidad Nacional de Colombia. Validación de un algoritmo de enmallado para el método 3D-FDTD por medio de un montaje experimental de diafonía de dos conductoresĮ. Validation of a non-uniform meshing algorithm for the 3D-FDTD method by means of a two-wire crosstalk experimental set-up