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Comparison of the Beckmann model with bidirectional reflectance measurements.The Beckmann model is compared with recently reported bidirectional reflectance measurements. Comparisons revealed that monochromatic specular and bidirectional reflectance measurements are not adequately described by corresponding results evaluated from the model using mechanically acquired surface roughness parameters (rms height and rms slope). Significant improvement between measurements and predictions of the model is observed when optically acquired surface roughness parameters are used. Specular reflectance measurements for normal to intermediate polar angles of incidence are adequately represented by the model provided values of optical roughness multiplied by cosine of polar angle of incidence are less than 27 times average optical rms slope.
Document ID
19730053765
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smith, T. F.
Hering, R. G.
(Iowa, University Iowa City, Iowa, United States)
Date Acquired
August 7, 2013
Publication Date
August 1, 1973
Subject Category
Instrumentation And Photography
Report/Patent Number
ASME PAPER 73-HT-11
Meeting Information
Meeting: Heat Transfer Conference
Location: Atlanta, GA
Country: US
Start Date: August 5, 1973
End Date: August 8, 1973
Sponsors: American Institute of Chemical Engineers, American Society of Mechanical Engineers
Accession Number
73A38567
Funding Number(s)
CONTRACT_GRANT: JPL-951661
Distribution Limits
Public
Copyright
Other

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