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Particle dynamics and heat transfer at workpiece surface in heat treatment fluidised beds

conference contribution
posted on 2009-01-01, 00:00 authored by Weimin Gao, Lingxue KongLingxue Kong, Fenghua SheFenghua She, Peter HodgsonPeter Hodgson
The particle behaviour is studied by the analysis of particle images taken with a high speed CCD digital video camera. The comparison of particle dynamics is 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 at part surfaces. The total and radiative heat transfer coefficients at different surfaces of a metallic component in a high temperature fluidised bed are measured by a heat transfer probe developed in the present work. The principle of the heat transfer probe is to measure the change in temperature of the heated metallic piece with time and, then, to extract the heat flux and heat transfer coefficients. The structure of the probe is optimized with numerical simulation of energy conservation for measuring the heat transfer coefficient of 150~600 W/m2 K. The relationship between the particle dynamics and the heat transfer is analysed to form the basis for future more rational designs of fluidised beds as well as for improved quality control.



Advances in Materials and Processing Technologies Conference (2009 : Kuala Lumpur, Malyasia)


1 - 11


Kuala Lumpur, Malaysia

Start date


End date




Publication classification

E2 Full written paper - non-refereed / Abstract reviewed

Title of proceedings

AMPT 2009 : Forging a better future

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