Modelling of impingement phenomena for molten metallic droplets with low to high velocities

H. Tabbara, S. Gu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Thermal spray coatings are formed by accelerating a stream of powder particles towards a targeted substrate surface where they impact, deform, and adhere. A fundamental understanding of the splat formation can pave the way for future developments in thermal spray technology through better understanding. Numerical modelling is applied in this investigation which simulates the detailed transient flow of a molten metal droplet impacting, deforming, and solidifying on a flat, solid substrate. The computations are carried out on a fixed Eularian structured mesh using a volume of fluid method to simulate the boundary between the metallic and atmospheric-gas phases. The results shed light on the break-up phenomena on impact and describe in detail how the solidification process varies with an increasing impact velocity.

Original languageEnglish
Pages (from-to)2081-2086
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number7-8
DOIs
Publication statusPublished - Mar 2012

Keywords

  • CFD
  • Droplet impact
  • Metal powder
  • Model
  • Spray
  • Thermal
  • VOF

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