Modelling metal powder production by the gas atomisation process
Lena, Claudio, Djambazov, Georgi and Pericleous, Koulis A. (2008) Modelling metal powder production by the gas atomisation process. TMS 2008 Annual Meeting Supplemental Proceedings: Volume 2: Materials Characterization, Computation and Modeling. The Minerals, Metals & Materials Society, Warrendale, Pennsylvania, USA, pp. 279-285. ISBN 978-0-87339-717-9Full text not available from this repository.
Metal powder in the range of 10-100 microns is widely employed in the production of Raney nickel type catalysts for hydrogenation reactions and hydrogen fuel cell manufacture. In this presentation we examine the modelling of powder production in a gas atomisation vessel using CFD techniques. In a fully coupled Lagrangian-Eulerian two phase scheme, liquid meal particles are tracked through the vessel following atomisation of a liquid nickel-aluminium stream. There is full momentum, heat and turbulence transport between particles and surrounding argon gas and the model predicts the position of solidification depending on particle size and undercooled condition. Maps of collision probability of particles at different stages of solidification are computed, to predict the creation of satellite defects, or to initiate solidification of undercooled droplets. The model is used to support experimental work conducted under the ESA/EU project IMPRESS.
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