Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
MODELING OF MUTUAL HEAT TRANSFER BY THERMAL RADIATION IN FINS
Submission Author:
Jonatas Quirino , RJ
Co-Authors:
Jonatas Quirino, Eduardo Dias Correa, RODOLFO SOBRAL
Presenter: Jonatas Quirino
doi://10.26678/ABCM.ENCIT2018.CIT18-0361
Abstract
The present work describes the thermal profile of double fins, where their surfaces interact thermally, generating mutual effects, perpendicular to their primary surface and in steady state, which dissipates heat by conduction, convection and thermal radiation. Neumann and Dirichlet boundary conditions are established, characterizing that heat dissipation occurs only on the fin faces, in addition to predicting that the ambient temperature is homogeneous. Heat transfer analysis is performed by computational simulations using appropriate numerical methods. The Finite Differences Method is applied to the problem formulation. For the real situation approximation, the thermal conductivity of the silicon is considered as a function of temperature at each point, which makes the equation that governs the nonlinear problem. Finally, the comparison of the results obtained with typical results proves that the assumptions of variable thermal conductivity, heat dissipation by thermal radiation and mutual interaction are crucial to obtain results that are closer to reality.
Keywords
Extended surface, Heat dissipation, thermal radiation, Mutual effect
