Eventos Anais de eventos
CREEM2025
CREEM 2025 - XXXI Congresso Nacional de Estudantes de Engenharia Mecânica Congresso Nacional de Estudantes de Engenharia Mecânica
CARACTERIZAÇÃO EXPERIMENTAL E MODELAGEM COMPUTACIONAL DO EFEITO JOULE NA RESISTIVIDADE DO CROMEL EM FUNÇÃO DA TEMPERATURA
Submission Author:
Carlos Alberto De Oliveira Filho , SP , Brazil
Co-Authors:
Carlos Alberto De Oliveira Filho, Fábio Silva Faria, Sandro Metrevelle Marcondes de Lima e Silva
Presenter: Carlos Alberto De Oliveira Filho
doi://10.26678/ABCM.CREEM2025.CRE2025-0150
Abstract
The electrical resistivity of metallic materials is a fundamental property for understanding electrothermal processes, being directly influenced by temperature. This study aims to estimate the resistivity of chromel, an alloy primarily composed of nickel and chromium, as a function of temperature through controlled experimental measurements under an inert argon atmosphere. The measurements were performed using the four-point probe method, employing chromel wires and temperature monitoring with a type K thermocouple, in order to minimize errors associated with contact resistance. Additionally, a computational model of the Joule heating effect was developed using the COMSOL Multiphysics® platform to simulate the temperature distribution and resistivity gradients within the material under electrical current flow. The experimental results were compared with the simulated data, allowing the validation of the proposed model and providing insights into the integrated electrothermal behavior of chromel. This study contributes to the improvement of technological applications based on chromel and offers a methodological approach that combines experimental characterization with numerical modeling
Keywords
Electrical resistivity, Chromel, Joule heating, Computational modeling
