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Predicting The Effect Of Operational Parameters On The Particle Size Distribution Of Powders Produced By An Industrial Close-coupled Gas Atomiser.

  • : Jennifer Thompson1, Samuel Rolland1, Oubay Hassan1, Johann Sienz1
  • : 1Swansea University
  • : PDF Download
  • : 2016

Abstract

The emergence of Additive Layer Manufacturing is an exciting development in powder metallurgy, which requires powder of consistently high quality.  Gas atomisation is a specialised processing route for the production of fine, spherical powders.  However, fully understanding and exerting a high level of control over this process is a challenge faced by industry.

Utilising Computational Fluid Dynamics (CFD), an axi-symmetric simulation of a production gas atomiser has been undertaken.  Coupling the CFD with a Discrete Particle Model, an assessment has been made of the effect of process parameters on the produced powder’s particle size distribution (PSD).  Appropriate models to capture the secondary break-up phenomenon of the atomising melt have been investigated, with process data used for the model's validation. As a result, a simulation methodology has been found to predict accurately the effect of operational parameter changes on PSD, which will be of benefit when optimising the process.

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