Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (5): 729-735.DOI: 10.12068/j.issn.1005-3026.2020.05.020

• Materials & Metallurgy • Previous Articles     Next Articles

Numerical Simulation of the Intersection Angle Influence on Atomization Process of Powders Produced by VIGA

GUO Kuai-kuai, CHEN Jin, LIU Chang-sheng, CHEN Sui-yuan   

  1. School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2019-11-19 Revised:2019-11-19 Online:2020-05-15 Published:2020-05-15
  • Contact: LIU Chang-sheng
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Abstract:

The effect of intersection angle on the primary and secondary atomization of vacuum induction melting gas atomization (VIGA) was studied by the combination of experiments and computational fluid dynamics CFD simulations. The VOF (volume of fluid) multiphase flow model based on the Euler-Lagrange method was used to simulate the primary atomization process and the discrete phase model (DPM) was used to simulate the breakup process and predict the particle size distribution (PSD) of Taylor analogy breakup (TAB) in secondary atomization. The results show that the simulated area of recirculation zone decreases with the increase of intersection angle. The fragmentation morphology of metal melt is presented as "fountain→umbrella" and the primary droplets size is 0.3~0.9mm. The Weber number (We) of liquid droplets is 10~90. With increasing intersection angle, the average particle size of the powders decreases gradually. Moreover, these simulation results prove reasonable, which the simulated particle size of the powders is in agreement with the experimental one when the intersection angle is 36°.

Key words: vacuum induction melting gas atomization (VIGA), primary and secondary atomization, intersection angle, flow field structure, particle size distribution

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