Abstract
The connection of directional solidification at low velocity with Saffman-Taylor fingering is discussed. We put forward some quantitative predictions concerning the shape of solidification cells, which can be gained from this analogy. We present also some numerical results without surface tension, which seem to go against the existence of wavelength selection by a solvability mechanism in this problem.
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In order to derive (22), we calculate ∫∫ dx dz div[z G(po,p)] as -∫ ds(f n.∇G(po,p)), where the surface integration area is limited by the two lines (x=±0.5) and by an arbitrary smooth profile called here f. Alternatively, we may estimate the first quantity by using the diffusion equation of the Green’s function.
We define dilog(z) as dilog(z) = ∫0 Z du log(1-u)/u
M. Ben Amar, B. Moussallam: Physica D 25, 155 (1987)
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© 1988 Springer-Verlag Berlin Heidelberg
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Amar, M.B., Dombre, T., Hakim, V. (1988). The Problem of Directional Solidification Revisited. In: Wesfreid, J.E., Brand, H.R., Manneville, P., Albinet, G., Boccara, N. (eds) Propagation in Systems Far from Equilibrium. Springer Series in Synergetics, vol 41. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-73861-6_4
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DOI: https://doi.org/10.1007/978-3-642-73861-6_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-73863-0
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