Crystal Research and Technology
Cryst. Res. Technol. 36 (2001) 663 - Abstract -

C. Stelian, T. Duffar* , J. L. Santailler**, F. Barvinschi***, I. Nicoara

Department of Physics, West University of Timisoara, Romania
*EPM-MADYLAM, ENSHMG, BP-95, France
**CEA/DRT/DTEN, Commissariat ŕ l’Energie Atomique, 17, Grenoble, France
***“Politehnica” University of Timisoara, Dept. of Physics, Romania

Analysis of the Factors Affecting the Interface Deflection in the Vertical Bridgman Configuration

A transient finite-element numerical simulation of the heat transfer and melt convection has been performed for the vertical Bridgman growth configuration in order to investigate the solid-liquid interface deflection. The numerical simulation is realized with the help of the finite element software FIDAPTM. A free surface model is applied for the description of the moving solid-liquid interface. By a dimensional analysis of the factors which affect the interface deflection, the influence of the non-dimensional ratio delta =VIH/(kLGL) on the interface curvature is studied. The dimensionless interface curvatures are computed for different values of the interface rate VI, the latent heat of fusion H, the liquid thermal gradient GL and the thermal conductivity of liquid kL. Finally a simple expression which contains the quantity delta is proposed for the interface deflection.

Keywords: Bridgman, numerical simulation, interface curvature, FIDAP


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