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Online ISSN 1552-4485; Print ISSN 0033-569X
Shape-preserving solutions of the time-dependent diffusion equation
Author:
Frank S. Ham
Journal:
Quart. Appl. Math. 17 (1959), 137-145
MSC:
Primary 76.00
DOI:
https://doi.org/10.1090/qam/108196
MathSciNet review:
108196
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Abstract | References | Similar Articles | Additional Information
Abstract: Exact solutions to the time-dependent diffusion equation are exhibited which correspond to the diffusion-limited growth of ellipsoidal precipitate particles with constant shape and dimensions proportional to the square root of the time. The asymmetry of the diffusion field in these solutions is consistent with the preservation of the particle’s shape during growth even if the diffusivity is anisotropic. Limiting cases for simpler geometries are derived and shown to be in agreement with previously known results for radially symmetric particles and isotropic diffusion. Similar solutions for hyperboloidal surfaces are exhibited and generalizations are considered analogous to those discussed by Danckwerts for one-dimensional diffusion.
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R. Rieck (1924), quoted by Frank in Ref. 2 below
- F. C. Frank, Radially symmetric phase growth controlled by diffusion, Proc. Roy. Soc. London Ser. A 201 (1950), 586–599. MR 36925, DOI https://doi.org/10.1098/rspa.1950.0080 C. Zener, J. Appl. Phys. 20, 950 (1949)
- P. V. Danckwerts, Unsteady-state diffusion or heat-conduction with moving boundary, Trans. Faraday Soc. 46 (1950), 701–712. MR 37452
- J. Crank, The mathematics of diffusion, Oxford, at the Clarendon Press, 1956. MR 0082827
- Philip M. Morse and Herman Feshbach, Methods of theoretical physics. 2 volumes, McGraw-Hill Book Co., Inc., New York-Toronto-London, 1953. MR 0059774 F. S. Ham, J. Phys. Chem. Solids, 6, 335 (1958)
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Article copyright:
© Copyright 1959
American Mathematical Society