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Roughness effects on radiant heat transfer between interacting surfaces.The radiative transfer between interacting plates with rough surfaces is analyzed on the basis of Beckman's (1963) rough-surface bidirectional reflectance model and, for comparison, on the basis of a direction-dependent specular reflection property model and an approximate rough surface model which assumes a diffuse distribution of the scattered energy. It is found that the overall heat transfer obtained with the Beckman model is only slightly (1.5%) less than that obtained with the direction-dependent specular reflection model. Furthermore, constant property specular reflection analysis gave results within 3% of the rough surface values. The region of uncertainty for the rough surface flux increases, however, as optical roughness increases.
Document ID
19720041573
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Houchens, A. F.
(Oakland University Rochester, Mich., United States)
Hering, R. G.
(Iowa, University Iowa City, Iowa, United States)
Savage, L. D.
(Illinois, University Urbana, Ill., United States)
Date Acquired
August 6, 2013
Publication Date
April 1, 1972
Subject Category
Thermodynamics And Combustion
Report/Patent Number
AIAA PAPER 72-305
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Thermophysics Conference
Location: San Antonio, TX
Start Date: April 10, 1972
End Date: April 12, 1972
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
72A25239
Funding Number(s)
CONTRACT_GRANT: JPL-951661
Distribution Limits
Public
Copyright
Other

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