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Temperature and flow visualization in a simulation of the Czochralski process using temperature-sensitive liquid
Jelena Aleksic1, Paul Zielke, Janusz A Szymczyk
1Department of Thermofluid-dynamics and Turbo Machines, University of Applied Sciences of Stralsund, Germany. jelena.aleksic@fh-stalsubd.de
Annals of the New York Academy of Sciences
|December 24, 2002
Summary
New particle image thermometry visualizes temperature and velocity fields in Czochralski crystal growth. This method aids in analyzing thermal convection crucial for crystal quality.
Area of Science:
- Materials Science
- Fluid Dynamics
- Crystal Growth
Background:
- Thermal and thermocapillary convection significantly impact momentum, heat, and mass transfer during Czochralski crystal growth.
- Single-point measurements are insufficient for understanding complex flow topography or validating simulation data.
Purpose of the Study:
- To develop and present a novel method for simultaneous, full-field measurement of temperature and velocity.
- To enable qualitative analysis of thermally driven convection in crystal growth systems.
Main Methods:
- Development of an experimental particle image thermometry technique.
- Utilizing computer-aided color analysis of thermoluminescent crystals (TLCs) for data acquisition.
Main Results:
- The particle image thermometry method successfully determines simultaneous temperature and velocity fields.
- Provides comprehensive spatial data for analyzing convection patterns.
Conclusions:
- The presented method offers a powerful tool for in-situ analysis of Czochralski crystal growth.
- Enables detailed investigation of thermal convection phenomena, crucial for optimizing crystal quality and growth processes.