Development of a numerical model for hydrogen bubble generation, dynamics and trapping during solidification of aluminium alloys through Eulerian-Lagrangian framework

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In the present study, the authors developed a new numerical model to predict the bulk fluid flow, heat transfer, hydrogen species transfer with the hydrogen bubble generation, dynamics and trapping during solidification of aluminium through the continuum theory with Lagrangian bubble dynamics. The generated bubble size is assumed to be dependent on the microstructure. The bubble drag force is newly proposed in the Euler-Lagrange framework. In a model casting system, almost all generated hydrogen bubbles are trapped into a solidified aluminium. However, the hydrogen bubbles are capable of generating in the melt phase and detaching from the mushy zone when the initial hydrogen concentration is high. In this case, the hydrogen bubbles move upward due to buoyancy and this movement is slightly affected by the surrounding melt flow.

Original languageEnglish
Pages (from-to)266-277
Number of pages12
JournalInternational Journal of Cast Metals Research
Volume32
Issue number5-6
DOIs
Publication statusPublished - 2019 Nov 2

Keywords

  • Aluminium casting
  • Euler-Lagrange coupling
  • OpenFOAM
  • hydrogen microporosity
  • numerical modelling

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Development of a numerical model for hydrogen bubble generation, dynamics and trapping during solidification of aluminium alloys through Eulerian-Lagrangian framework'. Together they form a unique fingerprint.

Cite this