THERMAL SCIENCE

International Scientific Journal

NUMERICAL SIMULATION OF RADIATIVE HEAT TRANSFER IN A BINARY-SIZE GRANULAR BED

ABSTRACT
The radiative heat transfer in a high temperature granular bed of binary-size mixture was explored in this paper. The effective view factor between particles decreases exponentially with the increase in particle interval, increases with the increase in the size of the absorption particle but is hardly affected by the volume ratio of the mixture. The effective thermal conductivity of granular bed was further deduced basing on the characteristic of the effective view factor. It is indicated that the thermal conductivity is proportional to the particle size and temperature cubed, and increases with the increase in the particle size ratio and volume ratio. Finally, modified calculation correlations of the effective view factor and effective thermal conductivity were developed for binary-size bed based on the simulation results, and good accuracy of less than 0.01 and 10% had been achieved, respectively.
KEYWORDS
PAPER SUBMITTED: 2022-02-04
PAPER REVISED: 2022-04-20
PAPER ACCEPTED: 2022-04-28
PUBLISHED ONLINE: 2022-07-09
DOI REFERENCE: https://doi.org/10.2298/TSCI220204091Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [5095 - 5108]
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© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence