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MM: Fachverband Metall- und Materialphysik
MM 35: Topical Session Heterogeneous Nucleation I
MM 35.5: Talk
Thursday, March 17, 2011, 12:15–12:30, IFW D
growth of a two-phase finger in eutectic systems — •Guillaume Boussinot1,2, Claas Hueter1,2, and Efim Brener1 — 1forschungszentrum juelich — 2MPIE duesseldorf
We present a theoretical study of the growth of a two-phase finger in eutectic systems. This pattern was observed experimentally by Akamatsu et al., Phys. Rev. E 61, 3757 (2000). We study this two-phase finger using a boundary-integral formulation and we complement our investigation by a phase-field validation of the stability of the pattern. The deviation from the eutectic temperature and from the eutectic concentration provide two independent control parameters, leading to very different patterns depending on their relative importance. We propose scaling laws for the velocity and the different length scales of the pattern.