On experimental and numerical prediction of instabilities in Czochralski melt flow configuration

• Published in: Journal of crystal growth Vol. 318; no. 1; pp. 156 - 161
• Main Authors: Haslavsky, V., Miroshnichenko, E., Kit, E., Gelfgat, A.Yu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2011; Elsevier
• Subjects: A1. Convection; A1. Fluid flows; A1. Marangoni convection; A1. Thermocapillary convection; A2. Czochralski method; Cross-disciplinary physics: materials science; rheology; Crystal growth; Czochralski process; Exact sciences and technology; Growth from melts; zone melting and refining; Materials science; Mathematical models; Melts; Methods of crystal growth; physics of crystal growth; Numerical prediction; Oscillations; Physics; Position (location); Thermocouples; A2. Czochralski method; A1. Marangoni convection; A1. Convection; A1. Fluid flows; A1. Thermocapillary convection; Thermocouples; Fluid flow; Boundary conditions; Czochralski method; Thermocapillarity; Interferometers; Experimental result; Instability; Mathematical models; Crystal growth from melts
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2010.10.013

A new experimental facility for experimental validation of numerical codes calculating Czochralski melt flow is described. The setup is built to make all the boundary conditions reproducible in a mathematical model. Measurements are focused on the steady-oscillatory flow transition, which is defined by appearance of temperature oscillations measured independently by thermocouples and interferometer. Location of thermocouples is defined according to numerical predictions, which ensures measurements at locations where oscillations amplitude is large. Current state of comparison of experimental and numerical results is discussed.