Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.71: Poster

Donnerstag, 11. März 2004, 16:00–18:00, Poster D

Analysis of Solidification Dynamics by Wavelet Transformation Techniques — •Oliver Wittwer and Jörg H. Bilgram — Laboratorium für Festkörperphysik, ETH Zürich, 8093 Zürich (Schweiz)

Complex structures develop during solidification processes. Changes in growth morphology can be initiated in our experiments by changing the temperature distribution in the environment of a growing crystal [I. Stalder and J.H. Bilgram, Europhys, Lett. 56, 829 (2001)]. These transitions have gained interest since they have been discovered in metallic samples [K. Dragevski et al., Phys. Rev. Lett. 89, 215502 (2002)]. To study transitions in growth morphology and to monitor quasi stationary growth of dendrites we apply wavelet transformation techniques. We are able to detect changes in growth behaviour in a much earlier state as it is possible by determining growth parameters such as typical length scales or growth rates.