Mixed buoyant-Marangoni convection due to dissolution of a droplet in a liquid-liquid system with miscibility gap

Marcello Lappa, Chiara Piccolo, Luigi Carotenuto

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Abstract

Fluid flows occurring during solidification of metal alloys influence the composition and the properties of the final solid. Transport phenomena for this process are investigated using a model system: a dissolving drop inside a surrounding liquid under a thermal gradient. Experiments are performed with transparent organic liquids with miscibility gap. Novel mathematical models and numerical strategies are presented to correlate experimental results and in particular to explain the behaviour of stable and unstable solutal plumes that are formed above the dissolving droplet.
Original languageEnglish
Pages (from-to)781-794
Number of pages14
JournalEuropean Journal of Mechanics - B/Fluids
Volume23
Issue number5
DOIs
Publication statusPublished - Oct 2004

Keywords

  • dissolution process
  • miscibility gap
  • Marangoni convection
  • buoyancy convection
  • liquid–liquid systems
  • mathematical models
  • numerical strategies

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