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An interference problem with application to crystal growth

Published online by Cambridge University Press:  01 July 2016

F. B. Knight*
Affiliation:
University of Illinois at Urbana-Champaign
J. L. Steichen*
Affiliation:
MathX
*
Postal address: Department of Mathematics, University of Illinois at Urbana-Champaign, 1409 West Green Street, Urbana, IL 61810, USA.
∗∗ Postal address: MathX, 25 Lancaster Lane, Monsey, NY 10952, USA. Email address: steichen.mathx@astras.us

Abstract

We model diffusion-controlled crystal growth as an interference problem. The crystal layers grow by nucleation (initiation of crystallization centers) followed by attachment of molecules to the nucleus. A forming crystal layer completes by either spreading across the length of the crystal or by colliding with another spreading crystal layer. This model differs from the classical Johnson-Mehl-Kolmogorov model in that nucleation happens only on boundaries of a ‘seed’ crystal as opposed to nucleation from random points in a given region. Our results also differ from the limiting results found for this classical model. We use the invariant measure of an embedded Markov process to find the growth rate of the crystal in terms of the nucleation rates. Ergodic theorems are then used to derive explicit formulae for some stationary probabilities.

Type
General Applied Probability
Copyright
Copyright © Applied Probability Trust 2004 

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