Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
CONVECTIVE HEAT TRANSFER IN A CHANNEL WITH PROTRUDING INTERNAL HEAT GENERATING BODIES
Submission Author:
Paulo Mohallem Guimarães , MG , Brazil
Co-Authors:
Paulo Mohallem Guimarães, Rogerio Fernandes Brito, Leonardo Pereira, Arthur Paiva, Renato José Pinto, Genésio Menon
Presenter: Paulo Mohallem Guimarães
doi://10.26678/ABCM.ENCIT2020.CIT20-0012
Abstract
This work presents a numerical laminar study of conjugate heat transfer of air flow in a rectangular channel with conductive and internal energy generating sources placed on the channel bottom wall. The finite element method is applied to approximate solutions to the conservation equations in terms of stream function, temperature, and vorticity. This work aims to analyze the temperature and velocity fields, and the heat transfer in terms of Nusselt number. Some geometric and physical parameters are considered as follows: Grashof number from 0 to 1000000, Prandtl number equal to 0.7, Reynolds number from 10 to 1000 and diffusivities from 3 to 100, three source heights and channel inclinations of 0o, 45o and 90o. As it is expected, some recirculations and thermal wake appeared due to the presence of the heat generating bodies. The effect of the inclination angle study showed that the horizontal channel position presented a lower average Nusselt number for the first and third bodies. However, for body 3, this difference was much more significant. There was no significant difference in Nu between 45o and 90o for body 3.
Keywords
Mixed Convection, Internal Heat Generation, Protuding Heat Sources, Finite Elemento Method
