Metadata (abstracts and keywords) for the articles in the journal
N.A. Verezub, A.I. Prostomolotov Hydromechanic instability of crystals growth by Сzochralski method // Vestnik I. Yakovlev Chuvach State Pedagogical University. Series: Mechanics of a limit state . 2020. № 2(44). p. 37-48
Author(s):
N.A. Verezub, A.I. Prostomolotov
Index of UDK:
621.315.592:548.4
DOI:
10.37972/chgpu.2020.44.2.004
Title:
Hydromechanic instability of crystals growth by Сzochralski method
The mechanism of hydromechanical instability during Czochralski crystal growth from a melt is considered, which is associated with the formation of “cold plumes” under the crystal. For this purpose, the results obtained by two mathematical models: 1 – without and 2 – taking into account the crystallization process are analyzed. In the first case, an ethanol was as the model fluid, and the position of the crystallization front was set by the crystallization isotherm and was unchanged. Within the framework of this approach, the features of a transition from a stationary fluid flow to its unstable modes were studied, which are accompanied by the formation, development, and separation of “cold plumes” from the crystallization front (isotherm). In the second case, the model melts were as two materials with a melting point close to room temperature: heptadecane and gallium, which significantly differ in thermal conductivity. In this case, the influence of thermomechanical parameters on the formation of the crystallization front shape and the occurrence of hydromechanical instability in the form of "cold plumes"was studied.
The contact details of authors:
Verezub Nataliya A.
e-mail: verezub@ipmnet.ru, candidate of physical-mathematical sciences, assistant professor, senior researcher, Ishlinsky Institute for Problems in Mechanics of RAS, address: 101, bl. 1, Vernadskii avenue, Moscow, 119526, Russia.
Prostomolotov Anatoly I.
e-mail: prosto@ipmnet.ru, doctor of technical sciences, assistant professor, leading researcher, Ishlinsky Institute for Problems in Mechanics of RAS, address: 101, bl. 1, Vernadskii avenue, Moscow, 119526, Russia.