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Three-dimensional simulations of instabilities in a Marangoni-driven, low Prandtl number liquid bridge with magnetic stabilization to verify linear stability theory

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Abstract

The Full-Zone model of a liquid bridge encountered in crystal growth is analyzed via linear stability analysis and three-dimensional spectral element simulations, neglecting gravitational forces, for Prandtl number 0.02. The base state is axisymmetric and steady state. Linear stability predicts the character of flow transitions and the value of Re FZ , the thermocapillary Reynolds number, at which instabilities occur. Previous linear stability findings show that application of a steady, axial magnetic field stabilizes the base state. Previous three-dimensional simulations with no magnetic field predict a first transition that agrees well with linear stability theory. However, these simulations also demonstrated that continued time integration at just slightly higher Re FZ leads to what appears to be periodic flow. Closer inspection and comparison with linear stability theory revealed that this apparent periodicity was actually competition between two steady modes with different axial symmetries. Here an axial magnetic field is applied in three-dimensional simulations and it is verified that the magnetic field does have the intended effect of stabilizing the flow and removing modal competition. The azimuthal flow shows excellent agreement with eigenvectors predicted by linear stability theory.

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Authors and Affiliations

  1. Rice University, 6100 Main Street, Houston, TX, USA

    Kenneth E. Davis, Yue Huang & Brent C. Houchens

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  1. Kenneth E. Davis
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  2. Yue Huang
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  3. Brent C. Houchens
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Correspondence to Kenneth E. Davis, Yue Huang or Brent C. Houchens.

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Davis, K.E., Huang, Y. & Houchens, B.C. Three-dimensional simulations of instabilities in a Marangoni-driven, low Prandtl number liquid bridge with magnetic stabilization to verify linear stability theory. Eur. Phys. J. Spec. Top. 219, 13–23 (2013). https://doi.org/10.1140/epjst/e2013-01776-4

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  • DOI: https://doi.org/10.1140/epjst/e2013-01776-4

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