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Particle dynamics and heat transfer at workpiece surface in heat treatment fluidised beds
journal contribution
posted on 2011-01-01, 00:00 authored by Weimin Gao, Lingxue KongLingxue Kong, Fenghua She, Peter HodgsonPeter HodgsonThe particle behaviour in a heat treatment fluidised bed was studied by the analysis of particle images taken with a high speed CCD digital video camera. The comparison of particle dynamics was performed for the fluidised beds without part, with single part and with multi-parts. The results show that there are significant differences in particle behaviours both in different beds and at different locations of part surfaces. The total and radiative heat transfer coefficients at different surfaces of a metallic part in a fluidised bed were measured by a heat transfer probe developed in the present work. The structure of the probe was optimized with numerical simulation of energy conservation for measuring the heat transfer coefficient of 150-600 W/m2K. The relationship between the particle dynamics and the heat transfer was analysed to form the basis for future more rational designs of fluidised beds as well as for improved quality control.
History
Journal
Advanced materials researchVolume
264-265Pagination
1456 - 1461Publisher
Trans Tech PublicationsLocation
Stafa-Zurich, SwitzerlandISSN
1022-6680Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2011, Trans Tech Publications, SwitzerlandUsage metrics
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