Dresden 2006 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 16: Growth Processes and Surface Properties

DY 16.3: Vortrag

Montag, 27. März 2006, 16:45–17:00, H\"UL 186

Effect of a forced flow on dendritic solidification — •Thomas Fischaleck and Klaus Kassner — Otto-von-Guericke-Universität Magdeburg, FNW/ITP, PF 4120, 39016 Magdeburg

The effects of convective flow on dendritic crystal growth and pattern formation have been an active research topic for many years, but have not been fully understood on the theoretical side. This is mainly because the governing equations are considerably more complicated than without flow and microscopic solvability theory, successfully describing a single free crystal growing into its quiescent supercooled melt, is no longer applicable in its original formulation.

Introducing an asymptotic decomposition scheme to nonlinear solvability theory we substantially extend the range of this concept and present a new approach to dendritic growth phenomena based on a free boundary formulation. This technique is demonstrated for dendritc growth in a forced potential flow.