| Autor: |
Y. Y. Khine, J.I.D. Alexander, R. M. Banish |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Journal of Crystal Growth. 250:274-278 |
| ISSN: |
0022-0248 |
| DOI: |
10.1016/s0022-0248(02)02251-0 |
| Popis: |
During self-diffusion experiments of liquid metals, a small non-uniformity in temperature in the liquid may drive a buoyant convection even in microgravity condition that can result in erroneous values of the measured diffusivity. Since most liquid metals and semiconductors have high electrical conductivities, magnetic fields may be used to suppress the convection during the self-diffusivity experiments. In this paper, a numerical model that represents a self-diffusivity experiment with steady, uniform and non-uniform incoming heat fluxes through the side wall of the container and in the presence of an applied axial magnetic field is presented. Liquid germanium is used as a model fluid and two different magnetic field strengths and four possible heat transfer conditions are considered in the model. The simulated results show the importance of knowing the scale/form of the temperature non-uniformities for magnetic damping to be effective. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect