Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL STUDY OF COUPLED NATURAL CONVECTION, CONDUCTION AND RADIATION HEAT TRANSFER FOR A TROMBE WALL CONFIGURATION
Submission Author:
TAYNARA LAGO , PB
Co-Authors:
Kamal Ismail
Presenter: TAYNARA LAGO
doi://10.26678/ABCM.ENCIT2018.CIT18-0096
Abstract
In this study the conjugate heat transfer problem in an enclosure heated on one vertical wall and cooled at the other vertical wall in the laminar regime is investigated. A conducting solid body is placed in the enclosure and the fluid in the enclosure is assumed to be air. The model is based on the equations of conservation of mass, momentum and energy in steady state conditions. Boussinesq approach is used to approximate buoyancy term. The discretization of the conservative equations is done using the finite volume method. A radiation model has been included in the analysis to study the effect of surface radiation on the heat transfer characteristics of the cavity. The coupling of pressure and velocity field is performed through the SIMPLE algorithm. The effect of the conducting body is investigated through streamlines and isotherms for different internal solid sizes, thermal conductivity ratios between solid and fluid varying from 1 to 100 and radiation emissivities for all surfaces from 0 to 1. The results are presented in terms of temperature and velocity distributions in various parts of the system. Results show that radiation is the dominant way of heat transfer.
Keywords
Natural Convection, Radiation heat transfer, cavity, thermal comfort
