The dynamics of thermal regime changes of a local working zone in conditions of its heating by gas infrared radiators

A Nee

doi:10.1088/1757-899x/93/1/012009

Abstract

Mathematical modeling of unsteady heat transfer in a closed rectangular area with a local heat supply object in a conjugate formulation in working conditions of radiation source of energy is passed. Fields of temperatures and stream functions, illustrating the influence of a local typical object on thermal regime are received. The effect of Grashof number on dimensionless heat transfer coefficient - Nusselt number is investigated. The influence of nonconducted heat supply object on heat transfer rate in solution domain is showed.

Highlights

1.Introduction For modeling of temperature fields of local heat supply objects located in large industrial premises and heated by gas infrared radiators (GIR) was developed an approach [1], which is based on natural convection model in air-filled cavity with solid enclosing walls of finite thickness [2]
Heat sink to the enclosure structures and accumulation of heat in them was allowed at problem formulation [1], but was assumed that the radiation coming from GIR evenly distributed only on the lower horizontal boundary of the heating region
Comparing the results of numerical simulations, it can be concluded that the nonconducted object in the gas cavity significantly effects the character of heat transfer in this solution domain

Summary

Introduction

For modeling of temperature fields of local heat supply objects located in large industrial premises and heated by gas infrared radiators (GIR) was developed an approach [1], which is based on natural convection model in air-filled cavity with solid enclosing walls of finite thickness [2]. 1.Introduction For modeling of temperature fields of local heat supply objects located in large industrial premises and heated by gas infrared radiators (GIR) was developed an approach [1], which is based on natural convection model in air-filled cavity with solid enclosing walls of finite thickness [2]. Specific working area (heat supply object) was not considered as an obstruction for the movement from the lower boundary of the heated air in formulation problem [1].

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Conclusion