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

Gao, Weimin, Kong, Lingxue, She, Fenghua and Hodgson, Peter 2009, Particle dynamics and heat transfer at workpiece surface in heat treatment fluidised beds, in AMPT 2009 : Forging a better future, pp. 1-11.

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Title Particle dynamics and heat transfer at workpiece surface in heat treatment fluidised beds
Author(s) Gao, Weimin
Kong, Lingxue
She, Fenghua
Hodgson, Peter
Conference name Advances in Materials and Processing Technologies Conference (2009 : Kuala Lumpur, Malyasia)
Conference location Kuala Lumpur, Malaysia
Conference dates 26-29 October 2009
Title of proceedings AMPT 2009 : Forging a better future
Publication date 2009
Start page 1
End page 11
Keyword(s) particle dynamics
heat transfer
fluidised bed
heat treatment
Summary 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.
Language eng
Field of Research 091207 Metals and Alloy Materials
091504 Fluidisation and Fluid Mechanics
091505 Heat and Mass Transfer Operations
Socio Economic Objective 861203 Metal Castings
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
HERDC collection year 2009
Persistent URL http://hdl.handle.net/10536/DRO/DU:30021402

Document type: Conference Paper
Collection: Centre for Material and Fibre Innovation
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Created: Tue, 15 Dec 2009, 12:54:33 EST by Weimin Gao