scholarly journals Discussion: “Radiation Heat Transfer in Semigray Enclosures With Specularly and Diffusely Reflecting Surfaces” (Bobco, R. P., 1964, ASME J. Heat Transfer, 86, pp. 123–129)

1964 ◽  
Vol 86 (1) ◽  
pp. 129-130
Author(s):  
Philip F. O’Brien
Keyword(s):  
Heat Transfer ◽  
Radiation Heat Transfer ◽  
Radiation Heat ◽  
Reflecting Surfaces

Investigation on the Impact of Angle Dependency and Polarization on Radiation Heat Transfer

2021 ◽  
Author(s):  
Mathieu Wijnen ◽  
Jos van Schijndel ◽  
Gunes Nakiboglu
Keyword(s):  
Heat Transfer ◽  
Semiconductor Industry ◽  
Radiation Heat Transfer ◽  
Analytical Approximation ◽  
Radiation Heat ◽  
Modeling Tools ◽  
Increasing Demand ◽  
Radiation Modeling ◽  
Reflecting Surfaces ◽  
The Impact

Abstract In the semiconductor industry there is an increasing demand for thermal stability to optimize the performance of lithography machines. This results in a need for computational tools that are able to accurately model radiation heat transfer, with the ability to include specular and angle dependent reflection and take the influence of the polarization into account. An analytical approximation model of a square passage is formulated, that includes angle dependent reflecting surfaces and the influence of polarization. These problems can be used as benchmarks to verify radiation modeling tools, e.g. COMSOL. The tool is validated by modeling an experiment and comparing the numerical results with the experimental data. The impact of angle dependency and polarization on the heat flux through passages is discussed.

A Generalized Variational Method for Calculating Radiant Interchange Between Surfaces

1965 ◽  
Vol 87 (1) ◽  
pp. 103-109 ◽  
Author(s):  
E. M. Sparrow ◽  
A. Haji-Sheikh
Keyword(s):  
Heat Transfer ◽  
Variational Method ◽  
Solution Method ◽  
Radiation Heat Transfer ◽  
Governing Equations ◽  
Radiation Heat ◽  
Reflecting Surfaces ◽  
Transfer Problems ◽  
Approximate Solution Method ◽  
Variational Expression

A variational expression is devised from which the governing equations are derivable for all problems of radiant interchange between diffusely emitting and reflecting surfaces. This correspondence between the variational expression and the equations of radiant interchange serves as the basis of an approximate solution method for radiation heat transfer problems. The solution method is discussed in general and then applied to specific physical situations. It is shown that the variational method yields results with remarkable ease, especially when compared with the formidable computational task inherent in a direct numerical assault on the governing integral equations.

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