Apparent emittance of non-isothermal particulate deposits

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Abstract

This paper presents an analysis of a commonly used total emittance measurement technique for particulate deposits. The analysis indicates that apparent emittance of a non-isothermal particulate deposit could be significantly different from the isothermal emittance if there is a substantial temperature gradient across it and the deposit is composed of transparent material or coarse particles. Results indicate that care must be exercised in experimental set-up design and data reduction in order to have accurate inference of emittance or absorbance from such measurements.

Original languageEnglish
Pages (from-to)771-780
Number of pages10
JournalInternational Communications in Heat and Mass Transfer
Volume26
Issue number6
DOIs
Publication statusPublished - 1 Aug 1999

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