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morphological instabilities

ESAIM: Mathematical Modelling and Numerical Analysis (1)

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Stability of flat interfaces during semidiscrete solidification
Andreas Veeser
Journal:

ESAIM: Mathematical Modelling and Numerical Analysis / Volume 36 / Issue 4 / July 2002

Published online by Cambridge University Press:

15 September 2002, pp. 573-595

Print publication:

July 2002
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The stability of flat interfaces with respect to a spatial semidiscretization of a solidification model is analyzed. The considered model is the quasi-static approximation of the Stefan problem with dynamical Gibbs–Thomson law. The stability analysis bases on an argument developed by Mullins and Sekerka for the undiscretized case. The obtained stability properties differ from those with respect to the quasi-static model for certain parameter values and relatively coarse meshes. Moreover, consequences on discretization issues are discussed.