Effect of the crucible/crystal rotation on thermocapillary instability in a shallow Czochralski configuration
| Autor: | Zhouhua Qiu, Zhong Zeng, Linmao Yin, Hao Liu, Long Qiao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy Spectral element method General Engineering Crucible 02 engineering and technology Mechanics Condensed Matter Physics Thermocapillary flow Rotation 01 natural sciences Instability 010305 fluids & plasmas Physics::Fluid Dynamics Condensed Matter::Superconductivity 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Crystal rotation Legendre polynomials Dimensionless quantity |
| Zdroj: | International Journal of Thermal Sciences. 137:500-507 |
| ISSN: | 1290-0729 |
| DOI: | 10.1016/j.ijthermalsci.2018.12.016 |
| Popis: | To understand the effects of crucible/crystal rotation on the instability of thermocapillary flow in a shallow Czochralski configuration, a series of linear stability analysis were performed by using Legendre spectral element method, and the energy analysis was applied to explore the instability mechanism. The results indicate that there are two types of instabilities with the increase of dimensionless crucible rotation rate ωc. Thermocapillary force and crucible rotation are the main causes of flow instability for low and high crucible rotation rate, respectively. In the interval 1627 3600), and the thermocapillary force is the primary inducement of flow instability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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