Thermal convection during bridgman crystal growth
Abstract
Numerical experiments are used to study thermally driven flows which occur during vertical Bridgman crystal growth of a single component fluid. The solid-liquid interface was specified as parabolic and flow patterns were calculated for various insulation thicknesses, Grashof, Prandtl and Biot numbers. When the melt is on top and the gravity vector is axially downward it was shown that flow persists as long as a radial temperature gradient is present. If the interface is convex, as viewed from the liquid, a single cell is observed. A concave interface exhibits multiple counterrotating cells. The insulation thickness and Grashof, Prandtl and Biot numbers influence the flow in a quantitative manner.
- Publication:
-
Journal of Crystal Growth
- Pub Date:
- October 1984
- DOI:
- 10.1016/0022-0248(84)90114-3
- Bibcode:
- 1984JCrGr..68..747C
- Keywords:
-
- Bridgman Method;
- Crystal Growth;
- Free Convection;
- Liquid-Solid Interfaces;
- Single Crystals;
- Biot Number;
- Counter Rotation;
- Flow Distribution;
- Microgravity Applications;
- Prandtl Number;
- Space Commercialization;
- Fluid Mechanics and Heat Transfer