ARTICLE:

• THERMAL BOUNDARY MODULATION EFFECT ON THE FLOW AND CONCENTRATION FIELD ADJACENT TO THE SOLID-LIQUID INTERFACE  download article

E. A. Semma
LM laboratory, University Hassan I, Faculté des Sciences et Techniques de Settat, B.P. 577, Settat, Morocco

Mohammed El Ganaoui
SPCTS, CNRS U. M.R. 6638. Université de Limoges, 123 Av. Albert Thomas, 87060 Limoges, France

Victoria Timchenko
University of New South Wales

Eddie Leonardi
Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

ABSTRACT

This study investigates numerically the effect of modulation of boundary thermal conditions on the concentration field in the vicinity of the solid/liquid interface for low Prandtl number melt flow (Pr = 0.01) in an inverted vertical Bridgman configuration (heated from below). Computational results showed that modulation can significantly affect the distribution of the solute in the vicinity of the interface and result in the transition of the flow from a one cell to a two cell structure. Variations in the average flow and interface concentrations are presented as functions of modulation frequency and amplitude of the thermal boundary excitation are presented.

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