کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1792664 1023653 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of rotating magnetic fields on thermocapillary flow in a floating half-zone
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effects of rotating magnetic fields on thermocapillary flow in a floating half-zone
چکیده انگلیسی

Three-dimensional numerical simulation of thermocapillary flow in a floating half-zone is performed. The effects of rotating magnetic fields (RMF) on thermocapillary flow of semiconductor melt (Pr=0.01) under microgravity are investigated. With increase in the Marangoni number (Ma) from 15 to 75, the melt flow loses stability changing from a steady axisymmetric flow to a three-dimensional steady flow, and then to a three-dimensional oscillatory flow. Due to the excellent electrical conductivity of the semiconductor melt, the induced Lorentz force under RMF with rotating frequency λ=50 Hz is effective in stirring the melt in the azimuthal direction and suppressing axial convection, which are both effective in returning the thermocapillary flow after the first and second instabilities to a steady axisymmetric flow.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 316, Issue 1, 1 February 2011, Pages 177–184
نویسندگان
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