Variational-Iterative Method for Conductive-Radiative Heat Transfer in Spherical Inhomogeneous Medium

2000 ◽  
Vol 14 (4) ◽  
pp. 612-615 ◽  
Author(s):  
S. A. El-Wakil ◽  
E. M. Abulwafa
Keyword(s):  
Heat Transfer ◽  
Iterative Method ◽  
Inhomogeneous Medium ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Variational Iterative Method

scholarly journals An Iterative Method for Solving of Coupled Equations for Conductive-Radiative Heat Transfer in Dielectric Layers

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Vasyl Chekurin ◽  
Yurij Boychuk
Keyword(s):  
Heat Transfer ◽  
Iterative Method ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Thick Layer ◽  
Ir Radiation ◽  
Coupled Equations ◽  
Radiation Fluxes ◽  
Radiation Properties ◽  
Unperturbed Problem

The mathematical model for describing combined conductive-radiative heat transfer in a dielectric layer, which emits, absorbs, and scatters IR radiation both in its volume and on the boundary, has been considered. A nonlinear stationary boundary-value problem for coupled heat and radiation transfer equations for the layer, which exchanges by energy with external medium by convection and radiation, has been formulated. In the case of optically thick layer, when its thickness is much more of photon-free path, the problem becomes a singularly perturbed one. In the inverse case of optically thin layer, the problem is regularly perturbed, and it becomes a regular (unperturbed) one, when the layer’s thickness is of order of several photon-free paths. An iterative method for solving of the unperturbed problem has been developed and its convergence has been tested numerically. With the use of the method, the temperature field and radiation fluxes have been studied. The model and method can be used for development of noncontact methods for temperature testing in dielectrics and for nondestructive determination of its radiation properties on the base of the data obtained by remote measuring of IR radiation emitted by the layer.

Intensification of Radiative Heat Transfer and Development of New Types of Tube Furnaces

2005 ◽  
Vol 36 (6) ◽  
pp. 475-480 ◽  
Author(s):  
A. V. Stepanov ◽  
N. I. Sulzhik ◽  
V. N. Nikolaenko
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Tube Furnaces
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