Showing papers by "Ephraim M Sparrow published in 1965"
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178 citations
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78 citations
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TL;DR: In this paper, a method of analysis has been devised for determining the radiant interchange among surfaces, each of which may have both specular and diffuse reflectance components, and specific analytical and numerical consideration is given to radiant interchange in cylindrical and conical cavities and to radiant transport through a circular tube.
63 citations
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TL;DR: In this paper, the distribution of surface temperature along a flat plate experiencing simultaneous convective heat transfer, radiative exchange with the environment, aerodynamic heating, and internal heat sources or sinks is analyzed.
33 citations
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TL;DR: In this paper, the authors considered the radiant interchange in a circular cylindrical cavity of finite length for the condition wherein there is an axially increasing or decreasing temperature along the cavity wall.
Abstract: Consideration is given to the radiant interchange in a circular cylindrical cavity of finite length for the condition wherein there is an axially increasing or decreasing temperature along the cavity wall. The mathematical formulation of the problem leads to a linear integral equation which has been solved in closed form. The solution yields expressions for the local apparent emittance and for the over-all radiant energy transfer. These quantities fully specify the emission characteristics of the cavity.
25 citations
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21 citations
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TL;DR: In this article, the authors present a coherent picture of calculation methods and results for radiant interchange between surfaces and discuss the analysis for gray, diffuse enclosures which includes a generalization of presently available methods.
Abstract: Publisher Summary This chapter focuses on the renewed interest in radiation heat transfer processes that has been stimulated by modern technological developments, especially in connection with space flight and with high-temperature energy sources. This chapter is examines the radiant interchange between surfaces which are separated by nonparticipating media. The chapter presents a coherent picture of calculation methods and results for radiant interchange between surfaces and discusses the analysis for gray, diffuse enclosures which includes a generalization of presently available methods. Angle factors, which are necessary for such calculations, are also discussed. The gray, diffuse model is extended to systems in which there is a continuous variation of the radiant flux along the surfaces. Such a generalization requires that the radiant interchange be governed by integral equations rather than algebraic equations as is the case when the radiant flux is uniform over each surface in the enclosure. Various solution methods for such integral equation systems are discussed. Results are presented for the emission and absorption characteristics of cavities and also for the energy transport through various passages. The chapter also discusses methods of analysis for specularly-reflecting surfaces that are being devised.
15 citations
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13 citations
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12 citations
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TL;DR: In this article, a method of analysis is devised whereby the absorption of radiant energy can be determined without keeping track of individual rays as they undergo successive specular reflections at the curved wall of the cavity, and results are obtained both for the over-all energy absorption in the cavity and for the surface distribution of the locally absorbed radiant energy.
Abstract: Consideration is given to the radiant interchange in a specularly reflecting circular-cylindrical cavity that is irradiated by an obliquely inclined beam of parallel rays passing through the cavity opening. A method of analysis is devised whereby the absorption of radiant energy can be determined without keeping track of individual rays as they undergo successive specular reflections at the curved wall of the cavity. Results are obtained both for the over-all energy absorption in the cavity and for the surface distribution of the locally absorbed radiant energy.
9 citations