Experimental determination of the extinction coefficient for a packed-bed particulate medium
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Date
2006-01
Publication Type
Journal Article
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yes
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Abstract
The extinction coefficient of a powder mixture of ZnO and beech charcoal is determined at ambient temperature using two experimental set-ups: (a) radiation in the range 500-1000 nm is captured by a 200 m-diameter fiber optic and sent to a spectrometer equipped with a Si/PbSe detector; (b) radiation in the range 350-1100 nm is captured by a 5 mm-diameter Si-photodiode. Both set-ups measure the attenuation of intensity from a 3273 K blackbody source. The experimental results are implemented in the numerical solution of the equation of radiative transfer, using the Monte-Carlo ray-tracing technique. The extinction coefficient is determined to be 10103 615 m⁻¹ at 1000 nm using set up (a), and 7850 337 m⁻¹ for the range 350-1100 nm using the more accurate set-up (b).
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published
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Journal / series
Volume
19 (1)
Pages / Article No.
69 - 79
Publisher
Taylor & Francis
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Edition / version
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Date collected
Date created
Subject
Thermal radiation; Extinction coefficient; Monte Carlo; Porous media; Packed bed
Organisational unit
03530 - Steinfeld, Aldo (emeritus) / Steinfeld, Aldo (emeritus)
Notes
Received 15 April 2005, Accepted 15 June 2005, Published online 20 Aug 2006.