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Proceedings Paper

Observation of surface oscillation in a molten silicon column using moire interferometry
Author(s): Masanobu Sumiji; Kazuo Onuma; Shinya Nakamura; Nobuyuki Imaishi; Taketoshi Hibiya
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Paper Abstract

Surface oscillation due to oscillatory Marangoni flow in a liquid bridge of molten silicon was observed using phase- shift interferometry. The molten silicon surface was described by phase-distribution profiles with a sampling rate of 30 Hz. From the phase-distribution profiles, we analyzed the oscillation of the radial displacement, axial gradient, and azimuthal gradient of the molten silicon surface. The oscillation of the radial displacement, axial gradient showed an in-phase relationship. However, in-phase oscillation was not observed between the radial displacement and the azimuthal gradient. Marangoni frequencies was observed at 0.1 to 5 Hz in which the frequencies higher than 1Hz had not previously been observed by conventional methods. We also found eigenfrequencies of the liquid bridge at 8.8Hz and 11.5Hz.

Paper Details

Date Published: 6 July 1999
PDF: 9 pages
Proc. SPIE 3792, Materials Research in Low Gravity II, (6 July 1999); doi: 10.1117/12.351293
Show Author Affiliations
Masanobu Sumiji, Tokyo Institute of Technology (Japan)
Kazuo Onuma, National Institute of Materials and Chemical Research (Japan)
Shinya Nakamura, NEC Corp. (Japan)
Nobuyuki Imaishi, Kyushu Univ. (Japan)
Taketoshi Hibiya, Tokyo Institute of Technology and NEC Corp. (Japan)

Published in SPIE Proceedings Vol. 3792:
Materials Research in Low Gravity II
Narayanan Ramachandran, Editor(s)

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