Thermal analysis of heat sinks: an analytical approach using integral transforms

• Ano de defesa: 2020
• Autor(a) principal: Corrêa, Lívia Mantuano
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade do Estado do Rio de Janeiro; Centro de Tecnologia e Ciências::Faculdade de Engenharia; Brasil; UERJ; Programa de Pós-Graduação em Engenharia Mecânica
• Palavras-chave em Português: Mechanical engineering; Heat - Transmission; Thermal analysis; Integral transforms; Computational fluid dynamics; Engenharia mecânica; Calor - Transmissão; Análise térmica; Transformadas integrais; Fluidodinâmica computacional; ENGENHARIAS::ENGENHARIA MECANICA::FENOMENOS DE TRANSPORTE
• Link de acesso: http://www.bdtd.uerj.br/handle/1/17273

The present work develops an analytical approach using the Classical Integral Transform Technique (CITT) for solving heat transfer problems in heat sinks. The mathematical formulation is composed of a three-dimensional base and two-dimensional fins. The oncoming heat flux from a heated chip attached at the bottom of the base needs to be cooled to ensure its good performance and long service life. Fins coupled at the heat sink base’s top are responsible for increase the heat transfer, and the air flows between fins contributing to the temperature’s reduction of the system. The analytical methodology used is the Classical Integral Transform Technique, it is applied to solve the base and fins formulations. The fin-base coupling condition is then used to obtain the temperature field. OpenFOAM simulations are also performed for comparison purposes and to evaluate different shaped fins effectiveness. The developed analytical methodology innovates the study of heat transfer in heat sinks presenting the importance of 2D fin modeling for symmetrical and non-symmetrical cases.