Simulation of liquid metal flow induced by counter-rotating permanent magnets in a rectangular crucible

Ščepanskis, Mihails; Koroteeva, E. Yu.; Geža, Vadims; Jakovičs, Andris

doi:10.22364/mhd.51.1.5

Cited by 11 publications

(3 citation statements)

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“…More details regarding the equations and corresponding initial and boundary conditions are described in previous publication. 40) The physical parameters used for the simulation are list in Table 2. Figure 5(c) depicts the distribution of TE currents near a dendritic tip.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Dendrite Coarsening and Microsegregation in Al–Cu Alloy under a Steady Magnetic Field

Zhan

et al. 2019

Mater. Trans.

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The final mechanical properties of alloys are significantly influenced by the secondary dendrite arm spacing (SDAS). The application of a steady magnetic field (SMF) during solidification is a novel method to control the SDAS, however, the nature of the change in SDAS under an SMF is still an open question. In this work, dendrite coarsening in the Al4.5 mass%Cu alloy in an SMF and its effect on microsegregation were investigated experimentally by the quenching technique. The coarsening experiments showed that the SDAS increased in an SMF, which was mainly attributed to the thermoelectric magnetic convection (TEMC) while the change in solid/liquid interfacial tension in the SMF played an adverse role. Further, the variation of the microsegregation level in the SMF was examined by composition measurements. It was shown that the segregation ratio increased in the SMF, which could be ascribed to the reduction of diffusivity in the solid phase and the enlargement of SDAS in the SMF. Using a modified analytical model developed by Voller, the microsegregation levels with and without an SMF were predicted, which was in agreement with the experimental results.

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Section: Resultsmentioning

confidence: 99%

Enhanced Dendrite Coarsening and Microsegregation in Al–Cu Alloy under a Steady Magnetic Field

Zhan

et al. 2019

Mater. Trans.

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“…To account for slip effects (in other words, to solve the electromagnetic problem in the reference frame of fluid element) the coupling algorithm described in [3] is used. First, we calculate transient force density distribution in a static fluid, average it over one period of magnet rotation and use it as a momentum source in fluid flow simulation.…”

Section: Fig1 Model Schemementioning

confidence: 99%

Modelling of Rotating Permanent Magnet Induced Liquid Metal Stirring

Dzelme¹,

Jakovičs²,

Sarma³

et al. 2017

Proceedings of the VIII International Scientific Colloquium "Modelling for Materials Processing"

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In this work, we investigate numerically liquid metal stirring induced by rotating permanent magnets. We investigate the characteristic velocity dependence on the permanent magnet rotation rate and compare it to data from neutron radiography experiments. In addition to several recognized imperfections in the experimental results, we further improve the numerical model, investigating numerically the impact of using transient instead of timeaveraged force.

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“…The goals of the study of the mentioned MHD processes and of the MHD equipment development are topical for metallurgy and are considered in conjunction with different technological processes, such as melting, stirring, transporting, casting, and so on [1][2][3][4]. Along with the traditional electromagnetic stirrers, the focus is on the implementation of similar processes using rotating permanent magnets [5,6].…”

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confidence: 99%

Theoretical design fundamentals for MHD stirrers for molten metals

2016

MHD

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The summary of the obtained analytical expressions which define the corresponding circuit parameters of the MHD stirrer for molten metal is presented. The given expressions and dependencies can be used at the early stage of the design of such equipment depending on a given specification. The article also presents some differential characteristics obtained by calculation using numerical and analytical models. To understand the character of melt stirring and to provide technological recommendations on the production of certain alloys and on the maintenance of the equipment, numerical computation and analysis of magnetohydrodynamic processes in the melt bath have been carried out.

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Simulation of liquid metal flow induced by counter-rotating permanent magnets in a rectangular crucible

Cited by 11 publications

References 0 publications

Enhanced Dendrite Coarsening and Microsegregation in Al–Cu Alloy under a Steady Magnetic Field

Enhanced Dendrite Coarsening and Microsegregation in Al–Cu Alloy under a Steady Magnetic Field

Modelling of Rotating Permanent Magnet Induced Liquid Metal Stirring

Theoretical design fundamentals for MHD stirrers for molten metals

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