Dynamics of the crystallization front induced by the temperature gradient at the upper boundary of a horizontal layer of a fluid

被引：1
|
作者：
Arbuzov V.A. [1 ,3 ]
Arbuzov E.V. [2 ,3 ]
Dubnishchev Y.N. [1 ,3 ]
Berdnikov V.S. [1 ,3 ]
Melekhina O.S. [3 ]
机构：
[1] Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 1, Novosibirsk
[2] Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 4, Novosibirsk
[3] Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk
来源：
Optoelectronics, Instrumentation and Data Processing | 2017年 / 53卷 / 2期
关键词：
convection in the water–ice system; crystallization wave; Hilbert optics; optical diagnostics of flows; phase transition in a supercooled fluid;
D O I：
10.3103/S8756699017020042
中图分类号：
学科分类号：
摘要：
The dynamics of the crystallization front induced by the temperature gradient at the upper boundary of a horizontal layer of water bounded by flat thermostatted surfaces is studied. The formation and evolution of convective structures are visualized by methods of the Hilbert optics and digital video recording. The difference in the temperatures of the upper (T1) and lower (T2) thermostats satisfies the condition T1 < T2. In this system, the temperature of the cooled upper surface is an order parameter. Reaching a critical value of this parameter leads to a bifurcation phase transition from the liquid state (supercooled water) to the solid state (ice). The velocity and shape of the crystallization wave front are determined. The spatial-temporal state of the crystallization wave is found, in which the wave front shape is a line of equal velocities. The dynamic profile of the isothermal surface bounding the spatial shape of the solid phase is visualized. © 2017, Allerton Press, Inc.
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页码：131 / 135
页数：4
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