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Article Dans Une Revue Journal of Crystal Growth Année : 2012

Solute segregation in a lid driven cavity: Effect of the flow on the boundary layer thickness and solute segregation.

Résumé

Our objective in the present work is to study the effect of convective flows, ranging from laminar to fully turbulent, on solute segregation in directional solidification configurations. To do so, numerical simulations performed in a model 2D lid driven cavity: the problem parameters, apart from the species molecular diffusion coefficient, are the lid and growth velocities. Purely diffusive to fully convective mass transport conditions are modelled in our parametric study. In parallel, a scaling analysis aiming at the determination of the solute boundary layer thickness is proposed. The results show that a single non-dimensional number, based on the interface stress, is able to capture the physics of the solute transport phenomena. (C) 2011 Elsevier B.V. All rights reserved.

Domaines

Matériaux

Dates et versions

hal-00728112 , version 1 (04-09-2012)

Identifiants

Citer

J. P. Garandet, N. Kaupp, Dominique Pelletier, Y. Delannoy. Solute segregation in a lid driven cavity: Effect of the flow on the boundary layer thickness and solute segregation.. Journal of Crystal Growth, 2012, 340 (1), pp.149-155. ⟨10.1016/j.jcrysgro.2011.11.071⟩. ⟨hal-00728112⟩
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