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Dendrite growth under forced convection: analysis methods and experimental tests

 a,  b, c
a Department of Mathematical Physics, Ural Federal University named after the First President of Russia B. N. Yeltsin, prosp. Lenina 51, Ekaterinburg, 620083, Russian Federation
b Friedrich-Schiller-Universität-Jena, Physikalisch-Astronomische Fakultät, Löbdergraben Strasse 32, Jena, 07743, Germany
c Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Köln, Germany

An analysis is given of the nonisothermal growth of a dendrite under forced fluid flow in a binary system. The theoretical model used employs a free moving crystal—liquid interface and makes use of the Oseen approximation for the equation of motion of the liquid. A criterion for the stable growth of a two-dimensional and a three-dimensional parabolic dendrite is derived under the assumption of an anisotropic surface tension at the crystal—liquid interface, which generalizes the previous known results for the stable growth of a dendrite with convection in a one-component liquid and for the growth of a dendrite in a two-component system at rest. The criterion obtained within the Oseen hydrodynamic approximation is extended to arbitrary Peclet numbers and dendrite growth with convection in a nonisothermal multicomponent system. Model predictions are compared with experimental data on crystal growth kinetics in droplets processed in electromagnetic and electrostatic levitation facilities. Theoretical and simulation methods currently being developed are applied to crystallization processes under Earth and reduced gravity conditions.

Fulltext pdf (827 KB)
Fulltext is also available at DOI: 10.3367/UFNe.0184.201408b.0833
PACS: 05.70.Fh, 05.70.Ln, 68.70.+w (all)
DOI: 10.3367/UFNe.0184.201408b.0833
URL: https://ufn.ru/en/articles/2014/8/b/
000345112400002
2-s2.0-84911489822
2014PhyU...57..771A
Citation: Alexandrov D V, Galenko P K "Dendrite growth under forced convection: analysis methods and experimental tests" Phys. Usp. 57 771–786 (2014)
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Received: 7th, December 2013, revised: 18th, March 2014, 26th, March 2014

Оригинал: Александров Д В, Галенко П К «Дендритный рост с вынужденной конвекцией: методы анализа и экспериментальные тесты» УФН 184 833–850 (2014); DOI: 10.3367/UFNr.0184.201408b.0833

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