Intensive Emission of Droplets during Melting of Metal Samples in a High-Frequency Inductor

T. I. Borodina; Бородина Т. И.; V. V. Glazkov; Глазков В. В.; Yu. P. Ivochkin; Ивочкин Ю. П.; K. G. Kubrikov; Кубриков К. Г.; O. A. Sinkevich; Синкевич О. А.; I. O. Teplyakov; Тепляков И. О.; S. M. Yudin; Юдин С. М.

doi:10.31857/S0040364423020047

Intensive Emission of Droplets during Melting of Metal Samples in a High-Frequency Inductor

Authors: Borodina T.I.¹, Glazkov V.V.², Ivochkin Y.P.¹, Kubrikov K.G.¹, Sinkevich O.A.¹^,2, Teplyakov I.O.¹, Yudin S.M.¹^,2
Affiliations:
1. Joint Institute for High Temperatures, Russian Academy of Sciences
2. Moscow Energy Institute
Issue: Vol 61, No 2 (2023)
Pages: 258-264
Section: Heat and Mass Transfer and Physical Gasdynamics
URL: https://ruspoj.com/0040-3644/article/view/653139
DOI: https://doi.org/10.31857/S0040364423020047
ID: 653139

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Abstract

The results of experimental and computational studies of the processes accompanying the melting of metal samples heated in air using induced currents are presented. The materials used for the experimental models—spheres and cylinders with a characteristic size of 10 mm—were pure iron, nonferrous metals, and various grades of steel. An unusual physical effect observed in experiments with iron and steels and associated with the intense release of sparks from the samples was studied: small brightly glowing metal droplets. A possible thermomechanical mechanism for the emission of droplets is proposed, based on the occurrence of excess melt pressure during metal melting inside the volume of the sample, limited by the resulting solid shell consisting of iron oxides. Numerical calculations were carried out, the results of which generally confirm the hypothesis presented.

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