Bifurcation in axisymmetric Czochralski natural convection
作者:
Alessandro Bottaro,
Abdelfattah Zebib,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1988)
卷期:
Volume 31,
issue 3
页码: 495-501
ISSN:0031-9171
年代: 1988
DOI:10.1063/1.866830
出版商: AIP
数据来源: AIP
摘要:
Numerical simulations using a finite volume method with primitive variables formulation are presented for a natural convection flow in the Czochralski melt. In the limit of very small Prandtl numbers it is shown that unsteadiness appears in the form of regular oscillations for sufficiently high values of the Rayleigh number. Such regular oscillations are preceded by a multicell motion structure in the melt, with flow separation at the wall. The critical value of the Rayleigh number for the onset of the oscillations is determined by carrying out a series of time dependent calculations.
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