Review: possible strategies for the control and stabilization of Marangoni flow in laterally heated floating zones

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Abstract

The paper presents a comparative and critical analysis of some theoretical/experimental/numerical arguments concerning the possible stabilization of the surface-tension-driven (Marangoni) flow in the Floating
Zone technique and in various related fluid-dynamic models. It is conceived as a natural extension of the focused overview published in Cryst. Res. Tech. 40(6),
531, (2005) where much room was devoted to discuss the intrinsic physical mechanisms responsible for threedimensional and oscillatory flows in a variety of technological processes. Here, a significant effort is provided to illustrate the genesis of possible control strategies (many of which are still in a very embryonic condition), the underlying ideas, the governing nondimensional
parameters, the scaling properties. Particular attention is devoted to their range of applicability that is still the subject of controversies in the literature. The
discussion is supported by some novel numerical results. These simulations are used to provide additional insights into the physics of problems where experimental data are not available.
Original languageEnglish
Pages (from-to)171-188
Number of pages18
JournalFluid Dynamics and Materials Processing
Volume1
Issue number2
DOIs
Publication statusPublished - 2005

Keywords

  • floating zone technique
  • Marangoni flow
  • convective instabilities
  • thermal feedback control
  • magnetic fields
  • forced high-frequency vibrations
  • thermovibrational effects

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