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Diffusion-controlled growth [and discussion]

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Ball, Robin, Blunt, M. J., Spivack, O. R. and Rowlinson, J. S. (1989) Diffusion-controlled growth [and discussion]. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol.423 (No.1864). pp. 123-132. doi:10.1098/rspa.1989.0045

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Official URL: http://dx.doi.org/10.1098/rspa.1989.0045

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Abstract

The conditions of diffusion-controlled growth are outlined and the observed importance of anisotropy is discussed through a tentative flow diagram. A crucial role is played by the forwardmost tips, which lead to growth. The nature of the singularity in their growth rate determines the overall fractal dimension. This has been estimated in two dimensions from effective cone-angle models, which work well for the most extreme anisotropic growth and can be augmented into a self-consistent approximation for the isotropic fractal case. The way in which the tip growth rate singularity is limited by finite tip radius is also a key ingredient. For diffusion-limited solidification where it is set by competition with surface tension, this significantly changes the form of the equivalent model with a fixed (e.g. lattice spacing) imposed tip scale. The full distribution of growth rates everywhere provides a much richer problem. We show new data and examine the consistency of how sites can evolve from the regions of high growth rate where they are born, into well-screened regions devoid of further growth.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Anisotropy, Diffusion, Growth
Journal or Publication Title: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Publisher: The Royal Society
ISSN: 1364-5021
Official Date: 1989
Dates:
DateEvent
1989Published
Volume: Vol.423
Number: No.1864
Page Range: pp. 123-132
Identifier: 10.1098/rspa.1989.0045
Status: Peer Reviewed
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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