Large eddy simulation of Marangoni convection in Czochralski crystal growth

Xianrong Cen, Jiemin Zhan, Yok Sheung Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Large eddy simulation model is used to simulate the fluid flow and heat transfer in an industrial Czochralski crystal growth system. The influence of Marangoni convection on the growth process is discussed. The simulation results agree well with experiment, which indicates that large eddy simulation is capable of capturing the temperature fluctuations in the melt. As the Marangoni number increases, the radial velocity along the free surface is strengthened, which makes the flow pattern shift from circumferential to spiral. At the same time, the surface tension reinforces the natural convection and forces the isotherms to curve downwards. It can also be seen from the simulation that a secondary vortex and the Ekman layer are generated. All these physical phenomena induced by Marangoni convection have great impacts on the shape of the growth interface and thus the quality of the crystal.
Original languageEnglish
Pages (from-to)14-22
Number of pages9
JournalCrystal Research and Technology
Volume46
Issue number1
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • crystal growth
  • Czochralski
  • large eddy simulation
  • Marangoni convection

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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