Three-dimensionality of fluid flow in the benchmark experiment for a pure metal melting on a vertical wall

This work is devoted to the two- and three-dimensional modeling of pure Gallium melting in a cuboid cavity, as has been studied experimentally by Gau and Viskanta (C. Gau & R. Viskanta. J. Heat Transfer 108, pp. 171-174, 1986). The geometry and boundary conditions used in this work are taken fro...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2012-01, Vol.27 (1), p.012054-8
Main Authors: Wittig, Kay, Nikrityuk, Petr A
Format: Article
Language:English
Subjects:
Algorithms
Benchmarks
Boundary conditions
Computational fluid dynamics
Computer simulation
Flow distribution
Fluid flow
Gallium
Melting
Simulation
Three dimensional
Three dimensional analysis
Three dimensional models
Turbulence
Turbulent flow
Two dimensional
Velocity coupling
Walls
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Summary:This work is devoted to the two- and three-dimensional modeling of pure Gallium melting in a cuboid cavity, as has been studied experimentally by Gau and Viskanta (C. Gau & R. Viskanta. J. Heat Transfer 108, pp. 171-174, 1986). The geometry and boundary conditions used in this work are taken from the benchmark experiment. The fixed-grid technique with artificial porosity was implemented into a finite-volume code, where the pressure-velocity coupling was treated using the SIMPLE algorithm. The results of simulations showed that the so-called multicellular flow pattern occurs only in two-dimensional (2D) simulations at the beginning of melting. However, an analysis of three-dimensional simulations (3D) showed the absence of a multivortex structure at any time step. This fact is explained by the presence of walls in the third direction which suppress the flow and by the occurrence of weak turbulence in the bulk of the melt preventing the formation of the long-living multicellular flow pattern known from previous 2D simulations. Additionally, we studied the influence of the cuboid width on the flow structure and solid front shapes. The results are discussed.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/27/1/012054