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Numerical and Experimental Investigations of the Effect of Melt Delivery Nozzle Design on the Open- to Closed-Wake Transition in Closed-Coupled Gas Atomization

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Abstract

The single-phase gas-flow behavior of a closed-coupled gas atomization was investigated with four different melt nozzle tip designs with two types of gas die. Particular attention was paid to the open- to closed-wake transition. Experimental Schlieren imaging and numerical modeling techniques were employed, with good agreement between the two being found in relation to the wake closure pressure. It was found that the melt nozzle tip design had a significant impact on the WCP, as did the type of die used, with a convergent–divergent gas die giving significantly high WCPs.

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Authors and Affiliations

  1. Institute for Materials Research, University of Leeds, Leeds, LS2 9JT, UK

    Shahed Motaman (CFD Research Fellow), Andrew M. Mullis (Professor, Director) & Robert F. Cochrane (Senior Lecturer, Head of Materials Programs)

  2. Engineering Mathematics and Modelling, School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, UK

    Duncan J. Borman (Lecturer)

  3. Institute for Innovation in Sustainable Engineering, University of Derby, Derby, UK

    Shahed Motaman (CFD Research Fellow)

Authors
  1. Shahed Motaman
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  2. Andrew M. Mullis
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  3. Robert F. Cochrane
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  4. Duncan J. Borman
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Corresponding author

Correspondence to Shahed Motaman.

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Manuscript submitted July 15, 2014.

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Motaman, S., Mullis, A.M., Cochrane, R.F. et al. Numerical and Experimental Investigations of the Effect of Melt Delivery Nozzle Design on the Open- to Closed-Wake Transition in Closed-Coupled Gas Atomization. Metall Mater Trans B 46, 1990–2004 (2015). https://doi.org/10.1007/s11663-015-0346-6

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  • DOI: https://doi.org/10.1007/s11663-015-0346-6

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