Open AccessThe influence of Prandtl numbers of melts and crucible materials on the features of crystal growth by the Bridgman method
Author(s) -
В. С. Бердников,
S. A. Kislitsyn,
K. A. Mitin
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1382/1/012120
Subject(s) - crucible (geodemography) , crystallization , heptadecane , temperature gradient , convection , materials science , silicon , directional solidification , crystal growth , micro pulling down , prandtl number , crystal (programming language) , thermodynamics , mineralogy , mechanics , composite material , chemistry , metallurgy , physics , meteorology , microstructure , computational chemistry , organic chemistry , computer science , programming language
The processes of crystallization of silicon and heptadecan in flat-bottomed cylindrical crucibles in conjugate convective heat transfer regime were studied numerically by the finite element method. Crystallization of silicon was investigated in a graphite crucible. Crystallization of heptadecane was investigated in a Plexiglas crucible. The possibility of existence of two convective vortices over a solidification front during the crystallization of silicon and heptadecane has been discovered. Crystallization of heptadecane was studied at two rates of lowering the crucible into the cold zone. Lowering of the crucible was simulated by moving the breakpoint in the temperature distribution on the outer side of the crucible walls. The breakpoint was the boundary of transition from the wall area heated to the initial temperature to the area with a given temperature gradient. Adaptive grids on triangles tracking the position of the crystallization front at each time step were used. The software package of developed by the authors was used.