Spoke patterns on molten silicon in Czochralski system

Yi, Kyung Woo; Kakimoto, Koichi; Eguchi, M.; Watanabe, Masaru; Shyo, Toshiyuki; Hibiya, Taketoshi

doi:10.1016/0022-0248(94)90005-1

Cited by 62 publications

(15 citation statements)

References 9 publications

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“…This spoke-like structure was first reported in a report of numerical calculations [15] and the velocity distributions shown here are the first quantitative evidential experiment of this. Unlike the spoke-like structures appearing in the different natural convection systems [21,22], the structure observed here is quite steady and has no local unsteadiness. Although the shape of cold plume (i.e.…”

Section: Resultsmentioning

confidence: 77%

Experimental study of cell pattern formation induced by internal heat sources in a horizontal fluid layer

Takahashi¹,

Tasaka²,

Murai³

et al. 2010

International Journal of Heat and Mass Transfer

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This study determines the flow structure in a convection cell with an internally heated layer by PIV to elucidate the convection cell transition mechanisms. The vertical velocity component is determined and the cell behaviour with respect to Rayleigh number is investigated quantitatively. Cell expansion process is described as a consequence of development of the descending flow at the centre of cells. The results suggest that a spoke-like structure is stable in this system in ideal conditions and a double-cell structure is formed when there are restrictions on the system, i.e. finite lateral boundaries.

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Section: Resultsmentioning

confidence: 77%

Experimental study of cell pattern formation induced by internal heat sources in a horizontal fluid layer

Takahashi¹,

Tasaka²,

Murai³

et al. 2010

International Journal of Heat and Mass Transfer

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“…Since this pattern looks like the spoke of a wheel, it is called a spoke pattern. Furthermore, Yi et al [4] performed a 3-D numerical simulation of the silicon melt flow and verified asymmetric temperature profiles similar to the spoke patterns and related 0017-9310/$ -see front matter Ó 2005 Elsevier Ltd. All rights reserved. doi:10.1016/j.ijheatmasstransfer.2004.…”

Section: Introductionmentioning

confidence: 74%

Three-dimensional thermocapillary-buoyancy flow in a shallow molten silicon pool with Cz configuration

Quan

Peng

et al. 2005

International Journal of Heat and Mass Transfer

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“…Recently, the formation of a spoke pattern was reported for a molten silicon surface [ 14], while the spoke pattern had previously been reported only on oxide melts. The formation of the pattern can be explained by either the Rayleigh-B~nard or the Marangom-B~nard mechanism, depending on the temperature coefficient of the surface tension of the molten silicon.…”

Section: Surface Tensionmentioning

confidence: 98%

Thermophysical property measurements on molten semiconductors using 10-s microgravity in a drop shaft

Hibiya

Nakamura

1996

Int J Thermophys

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The effectiveness of 10-s microgravity on thermophysical property measurements on molten materials, such as molten semiconductors, is discussed. The thermal conductivity of molten InSb was successfully measured under microgravity conditions on board the German sounding rocket TEXUS and in a drop shaft in Hokkaido, Japan. Surface tension measurements using an oscillating drop method was attempted in low gravity using a parabolic flight of the NASA KC-135 aircraft. Combined levitation and microgravity, which can provide a contamination-free and undercooled condition, is recommended as a novel approach to obtain missing thermophysical property data on undercooled melts of semiconductors.

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Spoke patterns on molten silicon in Czochralski system

Cited by 62 publications

References 9 publications

Experimental study of cell pattern formation induced by internal heat sources in a horizontal fluid layer

Experimental study of cell pattern formation induced by internal heat sources in a horizontal fluid layer

Three-dimensional thermocapillary-buoyancy flow in a shallow molten silicon pool with Cz configuration

Thermophysical property measurements on molten semiconductors using 10-s microgravity in a drop shaft

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